McGahee didn't spend any time in Buffalo last offseason learning the new playbook under coach Dick Jauron. The Bills are expecting more of the same this offseason.
"Willis literally didn't know what to do on the plays," a source said. "After the play was called, we'd have another coach signaling to Willis what to do because he didn't know. He'd miss blocks [in pass protection] a few times, not because he was beat, but because he didn't know what he was doing.
"He just doesn't study. … His teammates noticed it, and it affected how they viewed him in the locker room."