It would have been asking a lot for Jason Day to keep scoring the way he had been during the first two days of the BMW Championship.

After all, the 27-year old Australian led by four strokes after shooting a course record 10-under-par 61 in Round 1 at Conway Farms in Lake Forest and his margin was five after a 63 in Round 2. Day matched the all-time PGA Tour scoring record for 36 holes and a continuation of that pace would have made him the first player to break 250 for 72 holes and he was also in position to claim the record for strokes under par in a 72-hole event – presently 31-under by Ernie Els in the 2003 Mercedes Championships on a par-73 course.

Well, talk about more record-setting subsided after Saturday’s round, when Day made four bogeys and showed he’s human after all. But his lead – now up to six strokes — still looks safe entering Sunday’s final round of the third event of the FedEx Cup’s four-tournament series. He cooled off to a 69 on Saturday and is at 20-under 203 for 54 holes. His six-stroke advantage is the biggest 54-hole lead of the season on the PGA Tour.

“It feels like I shot 80 compared to the first two days,’’ said Day, “but I’m not unhappy with the score. The first two rounds were great, but this was the more important one to get through, and I’m happy to have extended the lead.’’

If he hangs on to it Sunday he’ll pass Jordan Spieth and Rory McIlroy and claim the No. 1 spot in the World Golf Rankings. That, said Day, “is a life-long dream.’’

Even though another night of heavy rain – four inches pelted the course in a 48-hour span — further softened the course and resulted in the lift, clean and place rule put into place for the second straight day, the birdies didn’t come as easily for Day or anyone else. A change in wind direction caused that.

“There were tough pin locations with a northerly wind,’’ said Day. “It was the most difficult round we had this week.’’

Day first got to 20 under par after a spectacular approach over a tree to two feet at No. 12. That widened his lead to eight strokes over Rickie Fowler and Scott Piercy, but Day’s next tee shot sailed out of bounds and he scrambled to make bogey – his third of the round after making only two in the first two rounds.

By then Fowler had posted his 66 – the low round of the day — but didn’t envision much hope of catching Day. Fowler is tied for fifth, seven strokes off the lead. Piercy, who will be Day’s playing partner on Sunday, and Daniel Berger, who played with Day on Saturday, are tied for second. Unlike previous rounds, players will go off in twosomes off only the No. 1 tee in the final round. First tee time is 7:15 a.m., and Day and Piercy go off last at 12:40 p.m.

Day concluded his round with a 20-foot birdie putt, which he hopes will provide good momentum going into the final 18.

“I’ll be trying to extend the lead. That’s the mindset,’’ he said.

Others weren’t thinking the same way. Just staying in the top five or even the top 30 in the FedEx standings is important. Those in the top five after the BMW Championship are assured of winning the $10 million bonus if they can win next week’s Tour Championship in Atlanta. And, only the top 30 of the 70 starters at Conway Farms will qualify for that last playoff event.

“Conditions were a little tougher, and I was able to move up the board,’’ said Fowler after Saturday’s round. “You’ve got to look at Jason as an outsider. You don’t have to worry about him. There’s another tournament going on, and he’s in control of whatever he’s doing. If he happens to come back, then we may have a chance.’’

“The tournament is in Jason’s hands right now,’’ said McIlroy, who moved into solo fourth – seven back — after posting a 67. “It’s up to us that are behind him to get off to fast start, and he needs to come back to the field a little bit.’’

Jason Day’s one shot at shooting a first-round 59 in the BMW Championship fizzled Friday morning. The 27-year old Australian put his approach from the rough on the green, but not in the hole, and wound up settling for a 61 in the rain-delayed first round at Conway Farms in Lake Forest.

Day still owned a four-shot lead over playing partner Jordan Spieth and five others after Round 1 and didn’t lose momentum when the second round teed off 90 minutes later. He backed up the 61 with a 63 to hit the halfway point of the 72-hole competition at 18-under-par 124 and a five-stroke lead.

The second round ended more spectacularly than the first, as Day holed a 42-foot putt for eagle at No. 18. Before that he had seven birdies that were offset by one bogey. His 36-hole score tied the lowest all-time 36-hole score in PGA Tour history, matching marks posted by David Toms and Pat Perez.

“I came in this morning and didn’t shoot 59,’’ said Day. “I thought everyone was disappointed, and it’s hard to back up a good round with another one, but we had much calmer conditions.’’

There’ll be one big difference for Day entering the second half of the tournament. His playing companions won’t be his celebrated partners of the first two days, Jordan Spieth and Rickie Fowler – Nos. 2 and 3 behind Day in the FedEx standings. Both dropped back, Spieth now seven shots off the lead in a tie for fourth place and Fowler 11 back.

“Right now what Jason is doing on the course is something I haven’t watched or witnessed in my life,’’ said Spieth. “I feel like I should be paying to come watch some of this. It was special.’’

A red-shot 22-year old is still on Day’s heels; it’s just not Spieth. Daniel Berger went 65-64 in the first two rounds, and he had a sizzling playing partner in Brendon Todd. Todd, who strung four birdies early (holes 2-5), holed a lob wedge shot from 83 yards for eagle on his last hole for a 63 to join Berger at 13-under-par 129.

Day, Todd and Berger will now be in the featured final group Saturday, as more rain in the forecast forced PGA Tour officials to again alter the schedule. Instead of going with the planned earlier start with twosomes play will again begin at both the Nos. 1 and 10 tees at 10 a.m. with players going off in threesomes.

Scores figured to be low in the second round after two inches of rain doused the Conway layout overnight. That softened the greens, and necessitated the use of the lift, clean and place rule on the fairways.

“We had optimal scoring chances,’’ said Todd, who wasn’t the only one to take advantage. Dustin Johnson had the day’s low round, a 62, and Kevin Na, Hideki Matsuyama and Henrik Stenson all matched Todd’s 63.

“A course that’s as soft as this, the wind has died down and it’s not overly long,’’ said Rory McIlroy, the No. 2 ranked player in the world who shot 65. “The par for us out here really should be 67 or 66.’’

Berger, in his rookie season on the PGA Tour, and Todd started the week outside of the top 30 in the FedEx Cup rankings. Only the top 30 go to the final event, The Tour Championship next week in Atlanta. Berger started at No. 46 and Todd at No. 48. Both are winless on the PGA Tour but looking forward to playing with the red-hot Day.

“I played well with him last year on Sunday of the British Open,’’ said Todd. “We have a great rapport. When someone is playing as well as he is, sometimes it takes the pressure off of you and you just got out there and play your game. Hopefully I feed off of his momentum just like Daniel and I did the last couple days.’’

Berger was paired with Day two weeks ago in the Deutsche Bank Championship, second event of the playoffs, in Boston. Day was coming off a win at The Barclays, the first event in the playoffs.

“The funnest part about playing with Jason is the crowds,’’ said Berger. “You’ve got thousands of people watching you. For a young guy like myself, that’s the most fun. I thrive off playing with good players, and it’s going to be fun to experience that again.’’

Thursday produced a great first round at the BMW Championship – but it was a strange one, too, and it’s not quite over.

Sound confusing? Well, it certainly was.

Jason Day, the top-ranked player in the third tournament of these FedEx Cup Playoffs, was cruising and his playing partner, No. 2-ranked Jordan Spieth, was showing the same signs of brilliance he had earlier in the season – before he started the season-ending four-event series with two missed cuts.

Day smacked a solid tee shot on their final hole, No. 9 at Conway Farms in Lake Forest, and so did Spieth. Then, without a drop of rain falling, weather sirens sounded to suspend play 4:22 p.m. Twelve minutes later a vicious storm pelted the course and at 5:15 PGA Tour officials opted to end play for the day.

So, Day has to wait overnight before know if he can shoot a 59. He needs to hole out from the rough 44 yards from the pin to match the score shot by Jim Furyk in the first BMW Championship played at Conway Farms two years ago.

“If I make it, I make it,’’ said Day, who had one eagle, nine birdies, six pars and one bogey before the weather hit. He is 10-under-par for the tournament, four strokes ahead of Daniel Berger who finished his round with a 65 and five ahead of Spieth.

Day wasn’t thinking about shooting 59 – a score posted by only six players in PGA Tour history – until Spieth reminded him at the No. 9 tee that Conway is a par-71 course. Most layouts are par-72s.

“I should have known, because there are only three par-5s,’’ said Day.“I’m playing good golf, but trying to not think about it.’’

The Australian won last month’s PGA Championship as well as the first of the FedEx Cup Playoff tournaments. Despite those recent successes Day put a new, lighter driver in his bag this week. It proved a good decision on Thursday, most notably on the still-to-be-completed ninth hole where he blasted his drive 20 yards further than any of the other players in the field.

Day was in the featured threesome with Spieth and Rickie Fowler. They’re ranked 1-2-3 in the FedEx Cup standings and they drew a big following on opening day of the $8.25 million tourney. The middle of the round was spectacular, and Day and Spieth matched great shots. From No. 18 (the last hole of their first nine) to No. 4 – a five-hole stretch, both Day and Spieth were 5-under-par.

At No. 1 Day holed a 77-yard bunker shot for eagle. Moments later Spieth’s 7-iron on a 196-yard par-3 dropped in for a hole-in-one. Spieth also chipped in on the next hole for birdie and made a third straight bird with a three-foot putt on the next.

Day wasn’t to be outdone. He followed Spieth’s ace with a 30-foot birdie putt at No.2 and added birds at Nos. 3, 7 and 8 before the storm. Weather worries led to the schedule being adjust for Friday. Day will hit his approach to the No. 9 green at 7:30 a.m. That’s when first-round play resumes.

Second-round play was to begin at 11:20 a.m. but the start was moved up to 9 a.m. because more bad weather is in the forecast for Saturday.

Two players who were able to finish their rounds on Thursday are serious challengers for Day. Daniel Berger, who holed out for eagle at No. 9 to complete his round, posted a 6-under-par 65, which puts his four strokes behind Day, and Brendon Todd, who hit only 10 greens in regulation, chipped well enough to get in with a 66.

Todd is solo third among the finishers but Spieth, Kevin Chappell and Justin homas are at 5-under and still on the course.

There was one sad side to the opening round. Furyk, the course record-holder, withdrew after six holes with a painful wrist. He said he was “very concerned’’ that he’d be able to play in next week’s season-ending Tour Championship in Atlanta.

Never has the future of professional golf been put on display as dramatically as it will be on Thursday and Friday at Conway Farms.

The Lake Forest private facility has a dream threesome teeing of at 11:53 a.m. Thursday and 12:59 p.m. on Friday. That’s when Jason Day, Jordan Spieth and Rickie Fowler begin their bids for the title in the first two rounds of the BMW Championship. It’ll be the first time the young stars have played together in a threesome at a PGA Tour event.

“We’re going to have a blast,’’ said Fowler. “The three of us really enjoy playing together, and our caddies are all good friends. It’d be fun if we can build some momentum with all of us playing well the first two days, but there won’t be any shortage of smiles and laughs going on.’’

They’re playing together because they rank 1-2-3 in the FedEx Cup standings. In regular tournaments the pairings are determined by tournament officials; in the playoffs they’re determined by playoff standings.

Day is 27, Fowler 26 and Spieth 22. That’s as close as golf has come to a “Big Three’’ since the days when Arnold Palmer, Jack Nicklaus and Gary Player were in their heydays, and that legendary trio never played for the money that the Day-Fowler-Spieth group is chasing this week.

The BMW Championship, third event of the four-tournament FedEx Cup Playoffs, is a 72-hole competition with and $8.25 million prize fund and no cut for the 70 qualifiers. Sunday’s champion will receive $1,485,000.

Spieth didn’t survive the 36-hole cut in the first two playoff events but could still win the $10 million bonus awarded after next week’s Tour Championship in Atlanta. Spieth downplayed the back-to-back missed cuts.

“Everything feels normal. My game is in a solid state,’’ he said. “It’s just a matter of getting it rolling, get into a groove and start seeing some putts go in.’’

The FedEx point standings include results during the 47-event regular season. That’s why Spieth, winner of the Masters and U.S. Open, is in the mix despite his recent slump. Day won The Barclays, the first playoff event, and Fowler took the last one, the Deutsche Bank Championship. They’re using the BMW Championship to get into position for the big prize, to be awarded in Atlanta.

Any player ranked in the top five in the FedEx standings after this week’s tourney will win the big bonus with a win in The Tour Championship, and there is some long-term strategy involved.

“Just playing good golf and trying to win both tournaments. That’s the plan,’’ said Day. “Winning takes care of everything. That’s great to say right now, but it’s obviously harder to do.’’

Actually, there’s precedent for none of the “Big Three’ winning either this week or next. If a player down the list gets hot, he could claim the $10 million bonus as well.

“Exactly,’’ said Day. “You look at Billy Horschel last year and Camilo (Villegas) a few years back (2008). Things like this can happen.’’

Horschel, in this week’s field but down in 67th place in the FedEx standings, tied for second in the Deutsche Bank Championship last year and then won the BMW and the Tour Championship. Coupled with the bonus, he won $13,477,333 in just the final month of the season.

Players have taken different approaches in the FedEx Cup season. Some, with enough points going in, feel a week’s rest would be beneficial in the long run and skip a tournament. Phil Mickelson, most notably, has tried that tactic in the past and Sergio Garcia trumped him by skipping the first two tournaments this year. Both, though, will have to play well to get inside the top 30 – a requirement for play in Atlanta. Garcia enters the BMW at No. 54 in the standings and Mickelson is No. 61.

While all the players want to win the BMW Championship, the secondary goal is just to get into the top five on the point standings. Any of those five would win the bonus with a win in Atlanta regardless of where any of the other players finish.

Behind the Day-Spieth-Fowler trio in the top five are Sweden’s Henrik Stenson, who won the bonus in 2013, and Bubba Watson.

Funniest thing about the Gardner Heidrick Pro-Am, the last tuneup for the PGA Tour stars competing in this week’s BMW Championship at Conway Farms in Lake Forest.

The player grabbing the most attention wasn’t one of the professional golfers. It was actor/comedian Bill Murray, a long-time favorite in such golf events. Not only did Murray play in the tourney’s pro-am for the first time, so did his five brothers.

Murray was in a foursome headed by Charley Hoffman. Brothers Brian, Ed and Andy played with Gary Woodland and John and Joel Murray teed off with Jim Furyk. The pro-am also included Bears’ legend Brian Urlacher and new Bulls’ coach Fred Hoiberg, but Bill Murray was clearly the star of the show.

Hoffman led his team to the tee immediately after the first afternoon group – one headed by PGA champion and current FedEx Cup point leader Jason Day – teed off. As soon as Day’s group left the tee the gallery around the tee tripled in anticipation of Murray’s arrival and he had a following all the way around the course.

All the Murrays were caddies at the Indian Hill Club while growing up in Winnetka. They’re also partners in a popular Florida bar restaurant named CaddieShack, the name being derived from a popular golf-themed movie that had Bill as one of its stars.

Dressed in colorful, clearly non-traditional golf attire, Bill Murray delights galleries with his on-course antics but he’s had playing success, too. Paired with Illinois native D.A. Points, Murray has been a winner in the PGA Tour’s longstanding AT&T Pro-Am at Pebble Beach in California. This year he also was a hit at the John Deere Classic Pro-Am in the Quad Cities.

After Wednesday’s pro-am all six Murray brothers were inducted into the Caddie Hall of Fame in a ceremony in the Conway Farms clubhouse.

Jim Furyk wasn’t happy to hear about the changes made to the Conway Farms course in preparation for this week’s BMW Championship.

“Bummer,’’ he said. “Now I’ve got to learn it all over again.’’

Well, hardly. Tuesday is practice day for the 70 players who will begin the 72-hole competition at the Lake Forest layout on Thursday. They’ll find the changes to the course from 2013 relatively minor and — even without practice — it’s safe to say Furyk knows the course. Two years ago he covered it in 59 strokes in that first BMW Championship played there.

Furyk didn’t win the tournament – he finished third, three strokes behind champion Zach Johnson – but his hot second round made him the sixth player to break 60 in a PGA Tour event, joining Al Geiberger, Chip Beck, David Duval, Paul Goydos and Stuart Appleby.

“It was a pretty incredible feeling,’’ said Furyk, looking ahead to the third tournament of the four-event FedEx Cup Playoffs. “I got off to a great start, held it together in the middle after three-putting No. 5 and then had the mental hurdle of making birdies on two of the last four. My attitude and thinking process throughout that day was as good as it’s ever been.’’

Luke Donald, the former world No. 1 and a Conway Farms member, remains dazzled by what Furyk did. Donald’s best round on his home course is 61.

“It’s the type of course you can see that number if you’re really on,’’ Donald said. “But Jim did it on a cold, windy day when the next best score was 65. That round was special.’’

“I remember with a couple holes left thinking `How many times in your life will you get a chance to do something like this. Enjoy it, but don’t let it slip by.’’’

He didn’t, but there is a touch of mystery still connected to that epic day. Furyk posed for photographers with a ball emblazoned with the numbers “59.’’

Now he’ll admit that that wasn’t the ball he used to shoot the low score. A PGA Tour media official took a ball from Furyk’s bag and wrote the “59’’ on it. The ball that Furyk used is in his workshop at home but not on display.

“We don’t display stuff,’’ he said. “I might have the glove I used. I do have a stack of flags that I sign for charities.’’

The lack of interest in memorabilia isn’t limited to the record round, either. Witness what happened to the reward for his victory in the 2003 U.S. Open at Olympia Fields – the lone win in a major for the 45-year tour veteran.

“We don’t have a trophy room,’’ said Furyk. “The U.S. Open trophy sat in the kitchen for maybe six months. Everyone who came by had a drink out of it.’’

The 12-under-par round hasn’t been challenged by PGA Tour players since the 2013 BMW Championship. Last year’s tournament was played at Cherry Hills, in Denver, with Billy Horschel winning the title.

Furyk enters this BMW Championship in ninth place on the playoff standings. He won the $10 million bonus as FedEx Cup champion in 2010 and is in good position to crack the top 30 who qualify for next week’s Tour Championship in Atlanta. That’s where this year’s bonus will be awarded.

Going into the BMW, though, Furyk trails Jason Day, Jordan Spieth, Rickie Fowler, Henrik Stenson, Bubba Watson, Charley Hoffman, Zach Johnson and Dustin Johnson.

Gates opened at Conway Farms on Monday with the main attraction being a new event, the Evans Scholars Cup. It involved teams from Chicago area clubs. Donald, who didn’t qualify for the tournament, hosted a fundraiser for the First Tee of Greater Chicago in the evening.

In addition to the practice rounds Tuesday’s schedule includes the CDW Celebrity Skills Challenge at nearby Halas Hall. Golfers Camilo Villegas and Gary Woodland will join Bears’ players in the Fold of Honor benefit event.

The PGA Tour’s visit to Chicago isn’t an annual thing anymore, but when the circuit does come it’s a big deal. That’ll be the case this week when the BMW Championship returns to Conway Farms in Lake Forest.

This week’s $8.25 million event, which tees off on Thursday, is the second of three scheduled stagings at Conway Farms. The first was in 2013, and the third and final visit to Conway will be in 2017.

Last week the Western Golf Assn. announced the BMW Championship sites through 2019 — a continuation of its policy of coming to the Chicago area only every other year. The 2016 tournament will be played at Crooked Stick in Indianapolis. After the next return to Conway the event will move to Aronimink in Philadelphia in 2018 and come back to Chicago, at Medinah, in 2019.

All those events – including this week’s — will be hard-pressed to match the first visit to Conway, which hosted the PGA Tour for the first time in 2013 after being the site of a wide variety of top amateur tournaments.

“Record heat, frost, every weather pattern that week,’’ recalled Vince Pellegrino, senior vice president, tournaments for the Western Golf Assn. “Jim Furyk shooting a 59 when the average score for that day was par, oscillating balls on the first green, Hunter Mahan getting a hole-in-one, weather delays leading to a Monday finish, then Zach Johnson shooting 65 to win by two strokes.’’

This time Johnson is back, but as the reigning British Open champion. Two years ago his profile wasn’t so lofty. He was just worried about surviving this third stage of the FedEx Cup Playoffs – golf’s most lucrative competition. It started with 120 players – determined on a point system after the PGA Tour’s 47-event regular season — competing for $8.25 million at The Barclays in New Jersey. The playoffs then continued with the top 90 competing in Boston’s Deutsche Bank Championship for another $8.25 million.

Conway is the third leg of the season-ending playoff series, and it’ll send 30 players to Atlanta for The Tour Championship where another $8.25 million – plus a $10 million bonus for the series winner – will be on the line. Peak at the right time, and a golfer can become a very rich man in a very short period of time. That’s what happened to Billy Horschel last year, when he won the last two playoff tournaments as well as the bonus in a span of barely three weeks.

The playoffs have been a bit on the weird side midway through the four-tournament series this year. The top two players in the world rankings – Jordan Spieth and Rory McIlroy – have done little. Spieth, the Masters and U.S. Open champion, didn’t even survive the 36-hole cut in the first two playoff events.

Two other young stars — PGA champion Jason Day and Rickie Fowler – have taken advantage of the Spieth-McIlroy letdown, Day winning The Barclays and Fowler the Deutsche Bank Championship. But all four hotshots, along with Johnson and Horschel, will be in the field at Conway.

There’ll be some notable absentees, to be sure. Tiger Woods didn’t qualify for the FedEx Cup events and three Chicago-connected players who are regulars on the PGA Tour – Conway member Luke Donald, Mark Wilson and Kevin Streelman – were eliminated the Deutsche Bank Championship.

The BMW Championship, though, has never had to worry about getting a great field thanks to its enviable spot as the next-to-the-last stop on the PGA Tour’s tournament schedule. The BMW started a run as the PGA Tournament of the Year in its first playing at Conway.

“We certainly expect this year’s to be as highly successful and well-attended as that one was,’’ said Pellegrino. Since the BMW replaced the Western Open as the PGA’s Chicago tour stop in 2007 the tournament has raised more than $19.6 million for the WGA’s Evans Scholars Foundation, which is financing the college education of 870 caddies this year.

Unlike 2013, the WGA has set an attendance limit for this year’s BMW though the weekly total is still expected to match last year’s 130,000. Crowds will be limited to 27,000 to help create a better spectator experience. The third-round crowd hit 35,000 at Conway two years ago. This year the crowds don’t figure to be as unwieldy and Conway itself will look different.

The club underwent a major renovation since the first PGA Tour visit, the result making the facility much more spectator-friendly. Seating around the 18th green has been doubled and there’s expanded viewing at Nos. 1, 2, 7, 9, 11 and 17. The Beer Garden has also been doubled in size and cart paths have been widened to improve spectator traffic around the course.

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