It's about time that Vance made a change!  I'm getting tired of hearing excuses as to why Trevor has been playing so poorly the last few games.  First it's the O-line, then it's the running game, then it's receivers dropping passes.  Truth is, in the last three games, Trevor has made some really boneheaded plays.  His INT's happened because he threw passes that he shouldn't have thrown.  If Trevor is as smart as I think he is, he would go ahead and get sacked if he can't find a place to throw the ball away.  I don't know what'll happen now that Brock is starting.  However, I don't think he could be any worse than Trevor is right now.  And Brock knows Mike McCoy's offense, since McCoy was the Broncos’ offensive coordinator when Brock was a rookie.