With his first two rounds at the 2015 BMW Championship, Jason Day tied the all-time PGA Tour record for the lowest 36-hole total in an event with two other players.
His 18-under 124 total at Conway Farms near Chicago tied him with the 124 shot by Pat Perez on two different par-72 courses in the first two rounds of the 2009 Bob Hope Classic and David Toms, who did it at the 2011 Crowne Plaza Invitational on the par-70 Colonial Country Club course.
Day had a good chance to also match or set the 54-hole scoring record, which is the 188 that Steve Stricker shot in the first three rounds of the 2010 John Deere Classic on the par-71 TPC Deere Run course.
The PGA Tour's 72-hole scoring record is 254, shot by Tommy Armour III at the par-70 La Cantera Resort course in the 2003 Valero Texas Open.
Day can also shoot for the Tour's scoring record in relation to par for a 72-hole event, owned by Ernie Els, who 31 under par on the par-73 Plantation Course at Kapalua at the 2003 Mercedes Championships in Hawaii. Jordan Spieth finished at 30 under par in an eight-shot win in the 2016 Hyundai Tournament of Champions on the same course.
(Steve Stricker owns the record for the most under par in the first 72 holes of a tournament, as he was 33 under par for the first four rounds of the then-90-hole Bob Hope Classic in 2009.)
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