A.J. McCarron suffered an injury during his first preseason start with the Bills, and it appears likely it will affect the franchise’s quarterback plans going forward. The free agent addition suffered a hairline fracture in his collarbone, Vic Carucci of the Buffalo News reports (on Twitter). 
McCarron started over Nathan Peterman on Friday night in Cleveland but may have to cede the reins to the younger passer now. Peterman started the Bills’ first preseason game, but McCarron represents the bigger investment, having signed a two-year, $8.1MM deal this offseason. He was viewed as the stopgap quarterback that will provide the bridge to Josh Allen.
Allen figures to see more time as a result of McCarron’s setback, and although the Wyoming product was not viewed as a ready-made NFL signal-caller, his NFL audition could come sooner than previously expected if McCarron misses extensive time.
McCarron’s only relevant NFL work came because of a 2015 Andy Dalton injury, and after a trade to the Browns fell through at the last minute last year, a setback in Cleveland ten months later may deny him a chance at a surefire starting role. Peterman has one game of NFL starting experience, but that start turned out to be one of the worst in NFL history. But he may be the next man up.
If only that trade rumors poll was posted a few hours later.
Peterman has 2 NFL starts. Chargers game with the 5 ints and the snow game against Indy.
The only reason to start Peterman is to keep the trash O Line from getting Allen killed. They may not want him getting David Carrd
I pray they start peterman and not Allen , Allen will get pummeled all year with that line