Lucas Glover holed out for an eagle from the 12th fairway en route to a nine-under-par 63 that gave him the first-round lead at the Barbasol Championship in Nicholasville, Kentuky.
Glover's eagle from 138 yards away at the par-4 12th hole shot him up the leaderboard to seven under after he had a string of five straight birdies from the fifth hole.
The 2009 US Open champion added consecutive birdies at 15 and 16 to take the lead over Ryan Armour and Ryan Moore at Keen Trace Golf Club.
"That's one of those hole locations where you've got a chance to get it really close because you've got a backstop behind it and just kind of got to get it online and it's going to feed to it," Glover said of the eagle, "and I did that and it just happened to go in".
Glover went 10 years between his last two wins on the PGA Tour (2011 and 2021).
The Barbasol is staged as an alternate event opposite the Genesis Scottish Open, where most of the best players in the world are tuning up for next week's Open Championship.
Behind Armour and Moore, four players are tied for fourth after shooting rounds of seven under, namely Wesley Bryan, Cody Gribble, Andrew Novak and England's Daniel Brown.
Gribble had two eagles in his round, beginning on the back nine with the par-5 15th and again toward the end of his round at the par-5 eighth.