It is very early. Lots of combinations will be tried by the time we get to the 3rd preseason game when it really does matter which group you practice and play with. The competition is just beginning.
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There are lots of folks to choose from. They don't all need to look good. Even with Mankins gone, there are seven returnees: five starters (Light, Kaczur, Koppen, Neal and Vollmer) and the two backups (Connolly and LeVoir). Connolly and LeVoir seem to be perennial JAG backups, which is fine. They are good enough for us to have the luxury of carrying a developmental lineman or even two on the 53 man squad.
Unless there is a great surprise, the rest of the players are competing for inactive positions and Practice Squad positions.
Ohrnberger, Bussey and Wendell were here last year and two will likely win the roster spots. Welch and Larsen could take the spots with solid performances or end up on the Practice Squad.
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Bussey is interesting since his strength is his play on the left side, at LT and LG. Bussey could sneak in to the 4th OT position if Kaczur moves to guard.
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And yes, Ohrnberger is conspicuous by his lack of mention. As has been said, he was a curious choice. Belichick liked him a lot, and one presumes dante did also. It seems early to give up on him.
One has to believe that we didn't draft a guard because dante liked what he had in Connolly, Bussey and Ohrnberger.
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THE EARLY LINES (without Mankins)
starters: Light, Kaczur, Koppen, Neal, Vollmer
game day backups: LeVoir, Connolly
inactive 53 man roster: Bussey, Orhnberger
Practice Squad: Wendell, Larsen, Welch