On April 14, 2011, Na played the worst ever par-4 hole on the PGA Tour since the tour began recording hole-by-hole scores in 1983, making a 16 on the ninth hole at the Valero Texas Open. Na needed extra shots after an unplayable lie from his tee shot and was then given a two-stroke penalty after his ball hit a tree and rebounded back onto him. It was initially scored as a 15 but changed to 16 on review. Na ended up shooting an eight-over-par round of 80, which saw him shoot four-under for his other 17 holes.