There were many famous Basketball players who wore number 12. Some of those players were Toby Bailey, Jim Barnes, John Barnhill, Drew Barry, and Josh Powell.
Mike Schmit or Chuck Klein was the first person and last person to wear #13
Gerald Henderson wore number 12
QB Charley Johnson in 1970 and 1971.
5 players on the floor and up to 12 on the team in college. 15 on the roster in the NBA but only 12 can dress for a game.