There is no higher honor a team can pay one of its former stars than retiring his number. It is the ultimate recognition of a player's supreme contributions to a franchise.
The first player to have his jersey retired was Yankee great Lou Gehrig, on July 4th, 1939. Other teams soon followed suit, and the movement spread to other sports besides baseball.
Since Gehrig, over 150 baseball players have had their jerseys retired. Jackie Robinson's No. 42 is retired by every MLB team, and many people have pushed for Roberto Clemente's No. 21 to be universally retired as well.
Now, we'll take a look at 30 players, some retired and some still active, who deserve to have their numbers retired by their respective teams.