NBA player Malcolm Thomas played for San Diego State.
NBA player Marcus Morris played for Kansas.
Nat Holman
Michael Jordan almost did he played Mlb, Nba, and golf!
If you are talking about professional sports in the US, there has only been one that I am aware of. Andre Ware played both in the NFL and the NBA. He played for the Detroit Lions in the NFL and the New York Knicks in the NBA.
NBA player Gary Harris played for Michigan State.
NBA player Spencer Dinwiddie played for Colorado.
NBA player Alec Burks played for Colorado.
53 for NFL and 15 for NBA
NBA and NFL games are played on Christmas Day.
NBA player Will Barton played for Memphis.
NBA and nfl are both awsome because you are in profensonal leage