Seamus Power was unable to keep pace with playing partner and eventual winner Talor Gooch at the RSM Classic at Sea Island, Georgia.
The Waterford native still managed to secure an impressive top four finish at the PGA Tour event as Power maintained his fine form throughout 2021, having secured his maiden victory on the world's top tour in July.
Power finished the week with his fourth successive round in the 60s, posting a 68 to end up on 15 under, seven shots behind Gooch who won by three shots.
Gooch kept some daylight between himself and his main competitors throughout, while Power's push for second place came unstuck on the 16th hole as he made a double bogey.
Mackenzie Hughes took second place on 19 under, while Sebastian Munoz, another playing partner of Power, took third place on 18 under.
Power ended in a share of fourth place alongside Tyler McCumber, Cameron Smith and Tom Hoge.
"To finish the fall season off like I just did, it's a dream come true," Gooch said afterwards.
"This gets me into some tournaments I wasn't into," he added.
"But I want to get to the Tour Championship and this puts me a little bit ahead of the ballgame for that journey. The goal is to win the Tour Championship."