(CNN) -- Zach Johnson retained his Texas Open title after defeating fellow American James Driscoll on the first play-off hole in San Antonio on Sunday.
Former Masters champion Johnson celebrates after retaining his Texas Open title at the first extra hole.
Johnson, the 2007 Masters champion, finished tied on 265 following a final round of 70 -- 10 shots worse than his course record-equalling performance on the penultimate day at the Resort Course.
Driscoll, meanwhile, shook things up with an eight-under-par round of 62 to take the clubhouse lead at 15 under par before Johnson forced sudden death having led by two shots from Paul Goydos after 54 holes.
Johnson had won his only previous play-off, at the 2007 AT&T Classic, while Driscoll had lost his at the 2004 Zurich Classic and Johnson put himself in perfect position for a second such win with an approach shot to 10 feet.
Driscoll failed to heap the pressure back on his rival from 29 feet leaving Johnson to putt out for birdie and the seventh PGA Tour victory of his career.
Johnson had completed his round on Saturday night at the end of a day when threats of lightning and thunderstorms brought play to a halt for almost five hours.
His 60 gave him the clubhouse lead, the final putt rolling in as the hooter sounded to call play to a halt due to fading light, leaving his rivals to return on Sunday morning to complete third-round play.
Playing in three-man groups from both tees to make up the lost time from Saturday, Johnson teed off for his final round with Goydos and Justin Leonard and was level for the day on his front nine.
He bogeyed the par-four 10th to fall to 14 under, alongside Goydos, one under for the day.
Driscoll had joined Johnson in the lead with one hole left to play, seven under for the day after five birdies and an eagle at the par-five 14th and he moved into the lead with a 15-foot birdie putt at the last.
Johnson got back to 15 under and a share of the lead with Driscoll after holing out from 13 feet from the fringe of the green but Goydos' round suddenly came to life on the closing holes with birdies at the 14th and 16th to move into the outright lead at 16 under.
Just as the lead came to him, Goydos threw it away, bogeying the 17th and 18th to finish at 14 under and in a tie for third alongside Bill Haas who had produced a final-round 65.
Leonard, the first round co-leader with Goydos, closed with a 69, in a tie for fifth place at 13 under par alongside England's Brian Davis.