James Hahn leaped into contention with a 12-under par 60 on Saturday at the PGA Barbasol championship but fellow American J.T. Poston carded a 66 for a one-stroke lead after three rounds.

Hahn had a putt on 18 for a 59 but couldn't get it to drop, just missing out on a chance to post the 13th sub-60 round in PGA Tour history.

Hahn's 132-yard approach on the par-four 18th spun back, leaving a 35-foot putt that he missed right. Because of wet conditions the players were allowed to use preferred lies.

"Felt like you only get so many opportunities to shoot 59, so I wanted to be aggressive," he said. "Took driver off the tee, didn't make a great swing but ended up in the fairway. I was lucky enough to put my hand on it. Hit a great second shot.

"The balls haven't been spinning back all week and to see it spin back 20 feet was kind of heartbreaking, but I hit a good number, landed right next to the flag and I hit a really good putt. Speed was perfect, just didn't give it enough break."

Poston shot his second consecutive bogey-free 66 to reach 19-under 197 for 54 holes at the Keene Trace Golf Club in Kentucky. He won the 2019 Wyndham Championship for his lone title.

American J.T. Poston grabbed a one-stroke lead after Saturday's third round of the US PGA Barbasol Championship
American J.T. Poston grabbed a one-stroke lead after Saturday's third round of the US PGA Barbasol Championship GETTY IMAGES NORTH AMERICA / ANDY LYONS

Hahn shared third with Joseph Bramlett at 17-under, two adrift of Poston and one behind second-place American Luke List.

The tournament was delayed twice because of bad weather as the leaders didn't tee off until 5 p.m. local time.

Hahn shot 69 in the first round and 70 in the second. He had four birdies on the front nine Saturday plus an eagle at the par-5 fifth then made four more birdies and another eagle, at the par-5 15th, on the back.

Hahn has only made nine cuts in 21 starts this season.

David Lingmerth (65) and Ireland's Seamus Power (67) were 16-under. Jason Dufner (65) was another stroke back with Derek Ernst (66), David Hearn (67), Bo Hoag (67) and Ryan Armour (69).

Defending champion Jim Herman was 14-under after a 65. He won in 2019, and the event was cancelled last year.