Horschel shoots 7-under on final round for maiden PGA win at Zurich Classic

Billy Horschel tees off on the second hole during the final round of the PGA Zurich Classic golf tournament at TPC Louisiana in Avondale, La., Sunday, April 28, 2013. (AP Photo/Gerald Herbert) (The Associated Press)

Billy Horschel putts on the first green during the final round of the PGA Zurich Classic golf tournament at TPC Louisiana in Avondale, La., Sunday, April 28, 2013. (AP Photo/Gerald Herbert) (The Associated Press)

AVONDALE, La. – Billy Horschel shot an 8-under 64 in the final round of the Zurich Classic, maintaining his composure through a pair of weather delays for his first-career PGA Tour victory on Sunday.

The 26-year-old former Florida Gator began the day two shots behind third-round leader Lucas Glover and surged into the lead with six straight birdies after the first weather delay. He finished at 20 under, narrowly holding off Shell Houston Open winner D.A. Points, who shot a final-round 65, finishing one shot behind.

The second delay happened before Horschel could take his second shot on the 18th hole, giving him 50 minutes to reflect on what was at stake — $1.19 million and a two-year exemption.

Chinese 14-year-old Guan Tuanlang finished 71st after making his second cut in two PGA events, the first coming famously at the Masters.