The 34-year-old followed an opening 71 with three straight 69s to finish two under par, seven shots behind winner Brooks Koepka.
The 46-year-old’s display captured the imagination of the spectators.
Koepka held off the challenge of Viktor Hovland and Scottie Scheffler to claim a third US PGA title.
Fifth major success labelled ‘coolest thing’ after Koepka fought back from injuries and loss of form.
A closing 67 earned him victory at Oak Hill.
The club professional’s tee shot on the par-three 15th slammed straight into the hole for an eagle.
Koepka is chasing a fifth major title win.
Koepka held a one-shot lead over Corey Conners and Viktor Hovland heading into the final round at Oak Hill.
Brooks Koepka will take a one-shot lead over Corey Conners and Viktor Hovland into the final round at Oak Hill.
Justin Rose carded a third round of 69 at Oak Hill to finish two under par, four shots behind the leader.