The Dallas Cowboys do not technically have any jersey numbers retired. There are obviously numbers that hold extreme significance in franchise history that they don’t hand out, even when the roster reaches 90 men, and you likely know the ones. We are talking about (going chronologically here) 8, 12, 22, 74, and recently 9 has joined the list.
While there are numbers that are avoided not every single one can be. We’ve seen players don the same digits as franchise greats, numbers like 20, 33, and 54 have all been handed out at different times despite belonging to some of the best players in team history.