Branden Grace shot a 5-under 66 Sunday at Harbour Town to earn his first PGA Tour victory by outlasting Luke Donald and Ru sell Knox to win the RBC Heritage at 9 under.The talented South African, who has a number of wins on the European Tour, Taylor Guerrieri Jersey birdied four of his first six holes Sundayto apply pre sure on Donald. Grace then birdied holes 9, 12 and 13 before dropping one shot on the par-3 17th.MORE: After finishing in the top 5 at the U.S. Open and PGA Championship last year, many expected Grace to break out on U.S. soil this season. The 27-year-old got off to a slow start this year, but his return to form could lead to a big summer."This is pretty much where my season kicked off last year, and I was excited to get back to this place," Grace said on CBS."A couple of the putts (I made) Rafael Montero Jersey on the back nine let me know I had a chance (to win). You can't force things on the last stretch of five holes, so I had to stay patient and grind."Grace stated before the season Mike Minor Jersey that he is committed to competing on the PGA Tour fulltime. He has a two-year exemption and an automatic spot in next year's Masters.Meanwhile, another year at Harbour Town led to another heartbreaking experience for Englishman Luke Donald. The former world No. 1 finished in a tie for second at 7 under after shooting an even-par 71 in Round 4. Donald has finished runner-up four times at this event. He still hasn't won.Ru sell Knox finished tied with Donald at 7 Nomar Mazara Jersey under after firing an impre sive 4-under 67 on Sunday that included some pre sure putts down the stretch. Knox entered the week sixth in the FedEx Cup standings. He now has a win and runner-up finish already this season.Bryson DeChambeau finished in a tie for fourth at 5 under with Kevin Naafter shooting a 3-under 68 on Sunday. The Jonathan Hernandez Jersey enigmatic rookie made waves last week at the Masters as an amateur and got his profe sional career kicked off in impre sive fashion. DeChambeau led the field in strokes gained: tee-to-green this week.Former champion Matt Kuchar led a host of players at 3 under, tied for ninth, after failing to capitalize on his opening round 4-under 67.