NFL uniform numbers

Players in the National Football League (NFL) wear uniform numbers between 0 and 99, with no two players on a team able to wear the same number outside of the offseason. Rules exist which tie a player's number to a specific range of numbers for their primary position. Additionally, rules exist which limit who may handle the ball on offense: generally players who are designated as offensive linemen, who wear numbers 50–79, are not allowed to handle the ball during a play from scrimmage, though they are allowed to do so if they report to the referee as playing out of position for a tackle-eligible play, if they pick up a fumble, or if they catch a deflected pass. The NFL's system, while having become more lenient since 2021, remains more rigid than other levels of football, which outside of offensive lineman wearing 50–79 are generally nonrestricted, especially on defense.