Ty Montgomery Defies Coaches Orders, Costs Packers The Rams Game
^^^^
You answered your own question....
Because who the heck is Ty Montgomery?.... And because Aaron Rodgers is Aaron Rodgers, and if given the opportunity(s)... he's done the miracle comeback thing many times.... LOL
That's why. (Duh)
It was selfish... that's all there is to it... if he was a player on my team... he would have been cut the next day. (of course the Packers have to consider the fact that they have like very little RB depth, so there's that)