Ice hockey does not have any formalized uniform numbering rules. Historically, in the National Hockey League, starting goaltenders wore Number 1, the backup goalie wore Number 30, and the other players (the "skaters") wore low numbers (generally Number 2-Number 28). It is still traditional for goaltenders to wear either Number 1 or numbers near Number 30 (in a range from approximately Number 29 to Number 35.) Some well-known goalies with non-traditional numbers include José Théodore (Number 60) and Ron Hextall (Number 27; Number 72 when Number 27 was unavailable). Evgeni Nabokov and Ed Belfour have both worn Number 20 in honor of their mentor, legendary Russian goalie Vladislav Tretiak.