Robert Allenby double-bogeyed the 72nd hole at the Mayakoba Golf Classic to fall to 15 under and into a playoff with rookie John Huh, who closed with a 63.
Chris Stroud had a shot to catch the duo at 15 under, but he also double-bogeyed the hole.
Matt Every and Colt Knost will tie for third after finishing 11 under. Overnight leader Daniel Summerhays shot a 73 and fell back into a tie for fifth.
FOLLOW THE PLAYOFF: Mayakoba Golf Classic