FC Barcelona will be turning 123 years old soon, as a thought experiment. Barcelona sports paper Diario SPORT has polled fans on which players deserve to have their numbers retired.
While not possible due to La Liga rules, it is a tradition in other sports such as handball and basketball to stop wearing the numbers of legendary players, such as, for example, the number 23 for the Chicago Bulls, once worn by Michael Jordan.
Retiring numbers is possible in football, particularly in the Italian Serie A. For example, Diego Maradona’s number was retired by Napoli.