I can’t recall the last time a team made a number retirement. I think the league has shown displeasure at it and I don’t think it’s a thing anymore. But the ones that were done are done.
In the backer/old school center numbering they are down to eight. But again if you open it for 1 team you have to for all. Some teams probably have 10 retired.
https://sports.yahoo.com/articles/3-round-2027-nfl-mock-125620957.html
It’s 3 rounds. They have us going dt, rb, and ot. I think we will be drafting much earlier than they have us.