Active: 1986-1991, 1993-1994
Teams: Royals/White Sox/Angels

Look up "badass" in the dictionary'll be looking a long time because there is no such word recognized by the word police. But if there was, there'd probably be a picture of Bo Jackson next to it. The man behind one of the '80s greatest memes (before that word was accepted, too), Jackson played baseball like a running back (duh), tracking balls in the outfield and crushing them in the batter's box—and breaking his bat over his knee when he didn't. Juiced? Bo knows, but we know this—dude was definitely badass.