By Daniel Chavkin The veteran golfer was upset with himself on the 11th hole amid a disappointing round. View the original article to see embedded media. The intensity of the Masters can get to some people, and it certainly got to Billy Horschel on Saturday. After a disappointing shot that dropped into the water on hole 11, the veteran golfer threw his club into the ground in frustration. Up to that point Horschel was one-over through 10 holes, but from that moment on he shot six-over par, including a double-bogey at 18. On the day, Horschel shot a 79, dropping him to 10-over for the tournamen…