Tell me about Derrick Dockery - new Buffalo Bill

[Misterbillysells]

what i dont really understand is why the bills are spending so much to improve their offensive line if their planning on trading Mcgahee anyways. It seems kinda counter productive to invest so much and trade away your featured back especially when he's dramatically more talented than your back up. Unless they think the "A-train" is as good as say Betts, but from what i've seen thats far from the case.