Cajuncowboy said:
Which is why I started this thread. I wonder when and why they started it.
It was started in 1973, as a way for officials to more easily identify players on the field by their position.
Until 2004, wide receivers were allowed to only wear numbers in the 80s. The NFL changed the rule that year to allow wide receivers to wear numbers 11-19 to allow for the increased amount of retired numbers, as well as more players at wide receiver and tight end (who also wear numbers in the 80s) coming into the league.
Although centers are supposed to wear numbers 50-59, they usually end up wearing 60-79, due to high amounts of linebackers.
Keyshawn Johnson started the trend when he wore number 19 in 1996 because the New York Jets had ran out of numbers in the 80s. In addition, the first three wide receivers taken in the 2004 NFL Draft - Larry Fitzgerald, Roy Williams, and Reggie Williams - all wear number 11. At the beginning of the 2005 season, 30 wide receivers had numbers in the teens, including Plaxico Burress (17, New York Giants), Braylon Edwards (17, Cleveland Browns) and Randy Moss (18, Oakland Raiders).
New Orleans Saints RB Reggie Bush is currently petitioning the NFL to let him keep the number 5 which he used at USC. This has opened debates as to possibly changing the current numbering system to a more flexible one, perhaps mirroring the college rules
Number allocations
Quarterbacks: 1-19
Running backs: 20-49
Wide receivers: 80-89, 10-19 if all are taken
Tight ends: 80-89
Centers: 50-59, 60-79 if all are taken
Offensive linemen: 60-79
Defensive linemen: 60-79 and 90-99
Linebackers: 50-59 and 90-99
Defensive backs: 20-49
Placekickers and punters: 1-19