Jackie Robinson's #42 was retired in 1997, and Bud Selig has said repeatedly that no other player will have his jersey number retired across MLB, despite an ongoing campaign by Clemente supporters to retire #21. Clemente's widow, Vera, and three sons came up with an alternate solution that would allow players to wear #21 only if they won the Roberto Clemente Award, presented annually to one player on each team who "demonstrates the values Clemente displayed in his commitment to community and understanding the value of helping others."
This plan would honor Clemente in a wonderful way. Players would have to earn the privilege of wearing #21 through charitable work or other positive contributions to the community, and Clemente's legacy as a player and a humanitarian would be further cemented. Let's hope that Selig gives this the serious consideration that it warrants.