Clearly because teams feared Brissett more says the TT crowd.
I could list 15 more dude. You're wasting your time. First time "it's just the GOAT." Second time "Two of the best QB's." By the time I get to Ryan Tannenhill, you'll be saying, "So TT's company are QB's who have played in the NFL, and also started in college? Such bad company!"
I wonder if McCoy's success stemmed from finally being healthy and playing under the best run game coordinator in the NFL today? Nah couldn't be. As we all know, McCoy had his second best year of his career under TT in 2015. Right? Oh, no.
Oh and his third closest year, a .1 difference from his next closest year, was with Nick Foles, Mr. Mobile himself, as shifty in the pocket as any QB ever has been. He carried the ball 100 times more than that 2010 year. Had an extra 600 rushing yards that year and a couple more TD's. But that was nothing compared to Vick and that extra .1 YPC though.