LAS VEGAS, 20 Oct, 2014 (AFP) - The 27-year-old American fired a three-under par final round of 68 at TPC Summerlin for a 20-under par total of 268 and a two-stroke victory over Kevin Streelman.
Martin, who was one-over par for the day through 14 holes, followed a birdie at 15 with an eagle at the par-five 16th that put him in the lead, and capped his round with another birdie.
"It was an awesome way to finish," Martin said. "I didn't feel like I had much going all day. Four-under on my last four to cap my first win was just awesome."
With his first PGA Tour title -- in the second event of the tour's 2014-15 season, Martin secured a berth in next April's Masters.
He played the first major of the year as an amateur in 2010.
Streelman birdied five of the last seven holes en route to a 65 for 266.
Scotland's Russell Knox, who shared the second-round lead, carded a one-under 70 and finished alone in third place on 268.
Knox's hopes of a first US tour title took a hit with bogeys at the third and eighth followed by a double-bogey at the par-five ninth.
His four birdies on the back nine included three in a row at 14, 15 and 16, but it wasn't enough.
Defending champion Webb Simpson briefly grabbed a share of the lead with his birdie at the 17th, but he finished with a bogey in a 68 that left him tied for fourth on 269.
He was joined by Jimmy Walker, who carded a 69, and Brooks Koepka, who fired a 68.
Leading scores after Sunday's final round of the US PGA Tour Shriners Hospitals Open (USA unless noted, par-71):
264 - Ben Martin 68-66-62-68
266 - Kevin Streelman 71-67-63-65
268 - Russell Knox (SCO) 65-67-66-70
269 - Webb Simpson 69-65-67-68, Brooks Koepka 69-68-64-68, Jimmy Walker 69-69-62-69
270 - Tony Finau 68-65-70-67, David Hearn (CAN) 70-66-66-68, Scott Piercy 67-67-67-69
271 - Adam Hadwin (CAN) 67-72-69-63, Scott Brown 70-67-68-66, Hideki Matsuyama (JPN) 66-71-68-66, Robert Streb 71-67-67-66, Spencer Levin 71-63-68-69, Brandt Snedeker 67-68-67-69
272 - Nick Watney 68-69-69-66, Harris English 71-68-66-67
273 - Carlos Ortiz (MEX) 69-70-69-65, Charles Howell 70-69-67-67, John Senden (AUS) 70-68-68-67, Colt Knost 68-72-65-68, Hudson Swafford 69-67-68-69, Jim Herman 68-72-62-71, Martin Laird (SCO) 64-70-68-71, Jason Bohn 68-68-66-71, Alex Cejka (GER) 69-68-65-71, Andrew Svoboda 66-67-67-73