I was reading an article on yahoo about players who played in both the majors in baseball and the NBA. Multi-sport athletes are nothing new. Jim Thorpe played in the majors and also in the fore runner of the NFL. Babe Didrickson Zaharias played golf and numerous other sports in her life. And of course, Michael Jordan, and Deion Sanders both played two sports at the professional level.
13 players have played in the NBA and the Major Leagues. Most have spent just a short time in one or the other. Chuck Connors, who gained fame as an actor in the TV series, The Rifleman, had a short career in both.