‘While not pinning the blame solely on McGahee for Buffalo’s stagnant offense, coach Mike Mularkey gave the impression earlier this week that his star running back may need to start taking his job a little more seriously. “He has to understand his role here and know that our success here, a lot of it is riding on what he does,” Mularkey said. “He has to understand that. And we’re still trying to get to that phase.”‘