The number 69 is not explicitly or formally banned by Major League Baseball rulebooks, but it is virtually never worn by players due to a combination of unwritten baseball traditions, organizational policies, and the cultural connotations associated with the digit. While leagues like the NFL and NBA have strict numerical restrictions based on player positions, Major League Baseball allows players to wear higher numbers, particularly during spring training or when major league rosters expand. However, equipment managers and team executives heavily discourage the selection of number 69 because of its prevalent sexual slang meaning, preferring to maintain a traditional, professional atmosphere in the clubhouse. While a few minor leaguers or players during exhibition games have occasionally sported high or unconventional numbers, established major leaguers voluntarily steer clear of it to avoid unwanted media attention, juvenile clubhouse jokes, or commissioner office scrutiny regarding uniform standards. Thus, while no official decree exists in the official rules prohibiting any specific integer between zero and ninety-nine, informal social pressure and team culture effectively keep the number off the field entirely.