Bills coach Sean McDermott said on Wednesday that Nathan Peterman would start at quarterback against the Chargers on Sunday because the fifth-round pick gave the team the best chance to win. McDermott made that decision after saying twice that Tyrod Taylor would remain the team’s starting quarterback, so his credibility might have taken a bit of a hit. If so, it took an even bigger one on Sunday. Peterman’s run in the lineup lasted for two quarters, which saw him throw five interceptions while the Chargers were building a 37-7 halftime lead.