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Shell Houston Open - Final Round

HUMBLE, TX - APRIL 01: Hunter Mahan watches his tee shot on the second hole during the final round of the Shell Houston Open at Redstone Golf Club on April 1, 2012 in Humble, Texas. (Photo by Matt Sullivan/Getty Images)

Mahan wins Houston Open

American Hunter Mahan became the first golfer to record multiple wins on the PGA Tour this year by claiming a one-stroke victory over Sweden's Carl Pettersson at the Houston Open in Humble, Texas, on Sunday.