Australian rugby Aussie Rules football player Brett Blackwell, who plays for Glenelg, busted his finger three years ago and it's hurt ever since. So he had a choice: surgically fuse the bones to end the pain and, as a result, his sports career, or chop off his finger. He chose the latter. From IOL:
"It's not something that's been done lightly and to chop a finger off, it's a bit drastic," Blackwell conceded to national broadcaster ABC.
"But I love my footy and love playing sport and if that's going to help me to succeed at this level then it's something you've just got to do," he added.
UPDATE: My pal Christian Chynoweth points out that in 1985, former San Francisco '49er Ronnie Lott had part of his injured finger amputated rather than miss games. Link