Active: 1989-1999
Teams: Angels/Red Sox/Yankees/Brewers

"Badass" comes in all shapes and sizes, one of which pretty clearly is the ability to play major league baseball when you have only one hand. Born without a right hand, Abbott played ten years in the majors, and won a gold medal in the 1988 Olympics. He'd be on this list if he played one year in the majors; the that fact that he once won 18 games in a season (with a sub-3.00 ERA), pitched a no-hitter, and rapped out two hits swinging one-handed, puts him in the top 5.