Huh made 3 at the par-3 10th hole - the fourth time the pair had been to the hole in sudden death. Allenby missed a 15-foot par putt after finding a hazard off the tee. Huh tapped in from 2 feet for par to win in just his fifth PGA Tour start. Neither player made a birdie in the eight holes.
Allenby could have avoided the playoff altogether, but made a double-bogey 6 in his final hole of regulation to allow Huh to force overtime.
For the Aussie, an 11-year winless drought continues. Allenby last won on the PGA Tour in 2001, taking the Marconi Pennsylvania Classic. In that same year, he won a six-man playoff for the Northern Trust Open.
The sudden-death playoff ties the longest played to completion in PGA Tour history. It is the fifth playoff to go eight holes, last done when Bob Gilder took the 1983 Phoenix Open.
The longest playoff in PGA Tour history was an 11-hole battle between Cary Middlecoff and Lloyd Mangrum for the 1949 Motor City Open. The pair eventually declared the event a draw.