I think the Bills did contemplate taking Mahomes at 10, but wanted someone who was a better fit for their offense. I remember an insider on this board (Leroi?) said that Bills scouts and coaches felt Josh Allen, QB, Wyoming, was a perfect fit for Dennison's offense. I believe Peterman was taken to be the backup to Josh Allen, and that they would go "all out" in order to get Allen next draft.
jeffismagic....by the way, I tried finding that SI article where it mentions teams wanting to trade up for Mahomes, but couldn't find it. Can you provide the link? I'm interested in reading it.