Phil Blackmar, 1990: 10
During the same round of the 1990 Players Championship that saw Roger Maltbie card a nine on the 17th, Phil Blackmar one-upped his colleague and carded a 10. As Blackmar tells it, his 9-iron skipped over the back of the green (the pin was in the back that day), and it landed in the water. Frustrated, he hit a wedge on his second shot, which also found the water. Sans tee, Blackmar then cranked a ball into the 16th fairway—a safe, but crazy play—and eventually got on the green. A few lackadaisical putts later, and Blackmar had rewritten the Island Green History Book.