WASHINGTON, 22 May 2016, (AFP) - The world number 15 edged out Brooks Koepka on the first hole of a playoff at the TPC Four Seasons in Irving to claim the ninth US PGA win of his career.
The 36-year-old's ninth victory saw him draw level with late great Seve Ballesteros for the most wins on the PGA Tour by a Spanish player.
"It's awesome to be up there with Seve, it means so much," said Garcia, who said his gutsy round had been in the spirit of his revered countryman, who died in 2011.
"I won it a little bit 'a la Seve' today," Garcia smiled. "I was battling. I was playing hard, chipping great, made some great putts."
The win puts Garcia firmly on track to make the European team for this year's Ryder Cup.
"I played nicely this week, I know I can play better," said Garcia. "This is going to drop me nicely into the Ryder Cup points league, and that means a lot to me."
Koepka was left ruing a late collapse on the back nine that saw him give up a three-shot lead to go into a playoff with Garcia, where his game swiftly unraveled.
"I really had no idea where the ball was going," Koepka said. "You've got to take some positives out of it, but it is disappointing."
Garcia had been put in the driving seat on the first extra hole, the 429-yard par-four 18th, when Koepka smacked his tee-shot into the water hazard, forcing a drop.
It got worse for Koepka when his third shot landed way short of the green. With Garcia comfortably reaching the green in two, it meant Koepka was left needing to chip in from the fairway to save par.
That miraculous task was beyond him, and Garcia two-putted to claim a confidence-boosting victory.
Garcia and Koepka advanced to the playoff after a nervy finale which saw both men drop shots on the back nine.
Garcia carded a two-under-par 68 to finish with a 15 under total of 265. Koepka joined the Spaniard on 15-under after a one-over 71.
Garcia's round included six birdies and four bogeys while Koepka carded three bogeys and two birdies.
The critical period came on the back nine, when Koepka suddenly saw a three-shot lead evaporate as Garcia grabbed a share of the lead.
Koepka looked to be cruising when Garcia found the water on the 14th and bogeyed.
Yet with victory beckoning, Koepka's composure deserted him.
The first wobble came on the 406-yard par-four 14th, when his second shot missed and landed well wide of the green.
He got onto the green in three but had to settle for a bogey.
Another bogey on the 15th -- which coincided with a Garcia birdie on 16 -- left the two front-runners level. Both players parred the remaining holes to set up the playoff.
Elsewhere Sunday, world number two Jordan Spieth's recent travails continued with a four-over final round 74 that left him five off the pace.
Spieth, aiming to bounce back to form after his Masters meltdown last month and a missed cut at last weekend's Players Championship, struggled home with six bogeys and two birdies in his final 18 holes after starting the day in second place, two strokes off the lead.
Leading scores after Sunday's final round of the PGA Byron Nelson Championship at Irving, Texas (par 70, USA unless noted, Garcia wins with par on first playoff hole):
265 - Sergio Garcia (ESP) 63-66-68-68, Brooks Koepka 65-64-65-71
266 - Matt Kuchar 65-67-65-69
267 - Colt Knost 70-63-69-65, Spencer Levin 68-66-67-66, Charles Howell 65-70-66-66, Robert Garrigus 65-70-66-66, Tim Wilkinson (NZL) 67-69-63-68, Bud Cauley 64-65-68-70
268 - Justin Hicks 70-65-68-65, Kyle Reifers 68-65-65-70
269 - Charley Hoffman 67-66-72-64, Tony Finau 68-67-68-66, Dustin Johnson 64-68-70-67, Chad Campbell 66-69-66-68, Steve Marino 69-64-66-70, Gary Woodland 71-64-64-70
270 - Wes Roach 64-66-73-67, Michael Thompson 70-65-68-67, Chez Reavie 67-66-69-68, Danny Lee (NZL) 63-69-69-69, Sean O'Hair 66-69-65-70, Jordan Spieth 64-65-67-74