Kevin Kisner sent shockwaves through the remaining Zurich Classic of New Orleans crowd when he chipped in for eagle on the 72nd hole to force a playoff on Sunday.
As the swirling Louisiana skies turned to dusk following a lengthy rain delay in the middle of the final round, Kisner and team-mate Scott Brown jumped around the par-five 18th green in excitement after holing out for eagle to finish level at 27 under.
The Kisner/Brown (60) pairing trailed Cameron Smith and Jonas Blixt (64) by a shot heading into the final hole, but the former's eagle shifted pressure back on the young duo.
Smith, an underrated talent from Australia, made birdie to force a playoff. Unfortunately, due to lack of sunlight, it will take place at TPC of Louisiana on Monday.
Kelly Kraft and Kevin Tway shot an 11-under 61 to vault into third, four strokes adrift of the leaders.
They shot a combined 20 under during the best-ball rounds, but just 3 under for alternate shot at the PGA Tour tournament.
Former world number one Jordan Spieth and Ryan Palmer finished fourth at 22 under.
Brothers Brooks and Chase Koepka (62) fought off a disappointing third round to finish tied for fifth at 19 under.
They were joined by Jason Dufner/Patton Kizzire (63), Bubba Watson/J.B. Holmes (64), Charley Hoffman/Nick Watney (68), Justin Thomas/Bud Cauley (61) and Angel Cabrera/Julian Etulain (65).