[QUOTE=Ellis Dee]
In the NFL, you can only dress 45 guys for any one game. There are 11 starters on both offense and defense, which is 22 total. Given that you need a kicker and a punter, that means you can’t even have one backup for each starter. Toss in the fact that you pretty much have to carry a third QB, plus all the guys on special teams, and you end up with roster spots being quite precious.
[/QUOTE]
Indeed, although their quarterback doesn’t count towards their 45 man-roster, technically. Teams carry a roster of 53, and on game day they designate seven as inactive for the day and one as their emergency (third) QB.
I don’t think any teams are carrying 8 receivers on the active roster, either. The distribution is fairly standard: 2 QBs, 4 RBs, 3 TEs, 5, WRs, 8 O-linemen, 13-D-linemen & linebackers (usually 6&7 for teams playing the 3-4 or 7&6 for teams playing the 4-3), 8 DBs, a kicker, and a punter. A team that plays a lot of two-tight end packages might have 4 TEs and one fewer receiver, or a team that plays a one back offense might replace one of the RBs with a WR. There are variations like that, but they are minor.
From that group of 45, they need a player who can also fill each of these roles: long snapper, kick returner, punt returner, holder.
Then on top of that, ther are a ton of special teams jobs: 11 on PAT defense, 10 each on kickoff, kick return, and punt return, 9 on a punt, and 8 on PAT attempt that aren’t accounted for above. That’s 58 slots, and you can be sure that each of the backups are expected to fill several of those.