The Democrat & Chronicle published a list of the uniform numbers for the 90 man roster:
https://www.democratandchronicle.com/story/sports/football/nfl/bills/2023/07/24/buffalo-bills-roster-2023-training-camp/70441881007/
Here are the unused numbers. Any known reasons why these were skipped (other than as marked)?
1
6
12 Kelly
25
32 (NOT retired)
34 Thurman
37
78 Bruce
84
95 (holding for Kyle Williams?)