(CNN) -- Zach Johnson secured his fifth PGA Tour triumph when he fired a five-under-par 65 for a 265 total and two-shot victory from David Toms and Adam Scott at the Sony Open in Honolulu, Hawaii.
Zach Johnson is encouraged by his start to the year after landing his fifth PGA Tour triumph in Honolulu.
The 2007 Masters champion started Sunday's final round with a one-shot lead but was in a three-way tie at the turn.
American Johnson then stepped up a gear with consecutive birdies and added two more at 14 and the last to claim $972,000 for the win.
Charles Howell III -- he was fourth at 12-under 268 -- and Toms had joined Johnson at 11-under entering the final nine holes.
But Toms could not match Johnson birdie-for-birdie and Howell ended up bogeying 18 after consecutive birdies at the previous two holes.
Johnson had three birdies and two bogeys on the front nine, but did not drop a shot on the run in, sinking a 10-footer at the 14th to take a two-stroke lead.
Toms birdied 18 to close within one and join Australian Scott who had made a late charge with birdies at 13, 16 and 18 in a six-under 64 to finish at 11-under.
Johnson closed out the win with his third birdie of the week at the par-5 18th where he stroked a 33-feet eagle putt to within 18 inches.
"I am encouraged with the way I started off this year," Johnson said. "It is good to know that the work I put in is paying off. I am thankful for that.