31. Curt Flood
A three-time All-Star and seven-time Gold Glove winner, Flood was a total badass on the field whose play in center was compared to Willie Mays' (hey, what can we say, we like defense). Of course he's best known for challenging baseball's reserve clause , the century-old rule that put players under the control of their original clubs for their entire careers. At the prime of his career he sat out a full season, and ultimately saw his career cut dramatically short because of his stance. Standing up for your principles? Badass.