Cutler can't play, you kidding me?

Cutler and Rivers used to jaw all the time in his Broncos days... Yet Rivers plays on a torn MCL and Cutler cant play on a frickin sprained MCL? He can't plant - neither could Rivers, but elite, or even good quarterbacks gut it out. THrow off the back foot if you have to. its not like SD had a half backup that they desperately needed RIvers - Volek is one of the top backup QB's. Still not liking CUtler