Buffalo Bills general manager Buddy Nix didn’t have any difficulty assessingVince Young’s attributes Friday after agreeing to a one-year contract with the free-agent quarterback.  Strong arm. Great mobility. And then there’s his winning record as an NFL starter.  But when it came to projecting the quarterback’s role with the Bills, Nix didn’t offer any guarantees except to say the starting job already is taken by Ryan Fitzpatrick, leaving Young to compete with Tyler Thigpen for a backup spot.  Read more after the jump. @Shay_Marie x @gametimegirl