15. Danny Ainge
Sports: Basketball & Baseball
Career Years: Basketball (1981-1995) Baseball (1979-1981)
OK, we all remember Danny Ainge as a member of those great Celtics teams during the '80s, but many forget (or never knew) that he had a three-season career in the MLB, too. From 1979 to 1981 he played second baseman for the Toronto Blue Jays. Ainge was batting .220 and two career home runs before making the switch to the NBA. Two championships, nearly 12,000 career points, and a sweet executive job later, it's safe to say he made the right choice.