I remember being confused about this call during the game, and that was compounded by the fact that the ref's mics weren't working. after seeing some talk about it, i figured the call had to be due to a hit on allen, cause i don't remember seeing anything with maynard that could be called. after watching the replay, it is apparent that a player comes and hits him in the back after he has thrown the ball to allen, and it is long after he has released the ball. roughing the passer might not be the correct call, and maybe unnecessary roughness would've been more appropriate, but you know that they have put rules in place to protect the qbs in particular. any unnecessary contact with a qb is gonna be called, and i believe that was the intention here. was it a hard enough shot to be worth a penalty? probably not, but they are mandated to protect the qb and it is justifiable. the hit very well could've been worse, or could be worse in the future if they don't call that and the player thinks it is ok to do it because he got away with it once. kinda like kids thinking it is okay to continually drink and drive cause they don't get caught the first 5 times.
that said, this was one of the calls i felt that we got away with on sat, but after watching it i can understand why they called it. in retrospect, the refs might not have been as horrible as i first thought, although they certainly blew the whistle quite a few times, and definitely were proactive with the whistle when they could've let a few of the calls slide - mostly calls that went against the home team, with the exception of the costly guyton late hit call.