4. Bob Feller
You've got to be a badass to finish your career more than 100 games above .500, with a 3.25 ERA to boot, and a 100 mph fastball that required a machine from the Army Ordnance Department to measure. But those aren't even Feller's most badass statistics. Try the five campaign ribbons and eight battle stars he picked up in active combat duty during his four-year stint in the Army during World War II.