bills get injured because other teams are flying around hitting the **** out of them while they play like they are running in wet cement. Add the fact that they suck donkey nuts and are generally out of position at any given time and the injuries are sure to pile up.
When your a good player (take a guard for example) and its a running play you fire off the ball, and because your not colin brown, you dominate the player your blocking and drive him backwards giving your RB a hole to run thru to daylight. When your colin brown you engage the defender off balance get crashed back into another player on the oline and fall awkwardly onto cj spillers knee causing torn ligaments.
See its easy to understand.