As a way to honor key contributors including players, coaches, fans, broadcasters and announcers, National Basketball Association (NBA) teams often retire their jersey numbers, win totals or microphones. In the case of jersey numbers, they are usually no longer available for future players to wear, although they can ask for permission from players whose jerseys are retired. Teams usually display these numbers by hanging banners on the rafters inside their home arena. As of 2021, three teams, Los Angeles Clippers, Memphis Grizzlies, and Toronto Raptors do not have any retired numbers, although the owner of the Memphis Grizzlies has stated that he will retire number 50 of Zach Randolph, 33 of Marc Gasol, number 11 of Mike Conley, and number 9 of Tony Allen in the future.