DALLAS, Texas: James Hahn fired his second bogey-free 64 of the week on Saturday while Australia’s Jason Day charged into contention entering the final round of the US PGA Byron Nelson tournament.
World number three Day blasted a seven-under par 63 in the third round at the TPC Las Colinas course just outside Dallas, but was two strokes off the pace as Hahn grabbed the lead on 12-under 198.
Fellow American Billy Horschel was second on 199 after a 66 that included birdies on his last three holes.
Day had eight birdies to move into a share of third with second-round leader Jason Kokrak, who shot 72. American Cameron Tringale was fifth at 201 after a 67.
Day made an incredible 60-foot birdie putt on the par-3 17th to move into a share of the lead at one stage.
Reigning Masters champion Sergio Garcia of Spain fired a 64 to finish on 202 and share sixth with former Byron Nelson champion Jason Dufner (65) and Bud Cauley (68).
Defending champion Garcia shot 29 on the back nine Saturday, the same score he posted on the front nine in the opening round when he won in 2016.
Americans Scott Brown (65), Scott Piercy (66), Grayson Murray (68), Chad Campbell (68) and South Korea’s An Byeong-Hun (69) were on 203.
World number one Dustin Johnson shared 19th after carding a one-over 71 Saturday, snapping a streak of 14 consecutive par-or-better rounds at the Byron Nelson for Johnson, who is seven shots behind Hahn.