Mickelson sank a four-foot birdie putt on the fourth extra hole to pocket $9 million and beat Woods.
Phil Mickelson claimed a thrilling play-off win over Tiger Woods after 22 holes to take home the prize money in the winner-takes-all $9m match in Las Vegas on Friday night.
In the controversial game, the golf legends who were mic'd up had a lot of conversations between them and made a number of side bets throughout the round.
Mickelson sank a four-foot birdie putt on the fourth extra hole to pocket $9 million and beat Woods in the exhibition clash.
Mickelson and Woods sparred over 22 rounds of match-play pay-per-view golf in front of an invitation-only gallery of 700 people at the Shadow Creek Golf Course in Las Vegas.
Mickelson clinched the victory with a short putt after Woods' tee shot landed on the green but he left his six-foot birdie putt short.
Mickelson had several putts to win earlier in the match that failed to drop, but he made no mistake on the final go at the par-three, 93-yard hole for the winner-take-all triumph.
While both the 48-year-old Mickelson and the 42-year-old Woods are past their prime, Friday's meeting between the 19-time major winners still provided some entertaining golf.
But since their heyday in the late 1990s and early 2000s, however, both Woods and Mickelson have been in steady decline.
While they both recorded victories on the PGA Tour in 2018, it has been five years since Mickelson won a major, while Woods hasn't hoisted a major since 2008.