The decision to have 8 or 9 linemen is a function of 5 factors:
1) PUP Presense - A virtual 9th O-linemen could provide flexibility for starting with 8.
2) Positional Depth - How many players to have at a given position is not just a function of hitting some quota. Some positions are deeper than others, and the roster composition should reflect the strengths/assets of a team. Perhaps after the 8th O-linemen, there is a steep drop-off.
3) Player Versatility - Players that can play both tackle or guard always helps. We have that with Cannon and potentially Fleming, if he's good his rookie season.
4) Practice Squad Management - Josh Kline was called up from the PS twice last year.
5) Recent Injury history - More injuries warrants more roster spots.
Bear in mind that Gronk or other players may be on the PUP to start the year. Therefore, we may have only 2 TEs to start the year. For CB, Browner is out the first 4 games. After 4-6 games, a player may be on IR or in-season IR, which would make the decision and roster management easier to hold 9 linemen.
For reference, the Seattle Seahawks held 10 linemen to begin the 2013 season (granted this # likely dances around during the season).
http://www.seahawks.com/news/articl...n-roster/ef6af9e9-c65a-4c0b-8af7-53378860f7ed
Conclusion: I think we keep 9 unless someone is on PUP. I don't know if we can expect rookies to start ahead of Wendel and Connolly week 1. Cannon could move inside, but who is our primary back-up tackle for our injury-happy tackles? The rookie Fleming? I foresee keeping the original 5, plus Cannon, and the 3 rookies. Kline is back to the PS, if he's still eligible. The 6th rounder could make it to the PS.