The second-year quarterback drew the fourth start of his career on Sunday and threw three interceptions, including a pick-6, in a 41-9 loss.
EJ Manuel, a Bills pivot from 2013-2016, took to Instagram on Sunday to question how he no longer has a job in the NFL when Peterman continues to see time under center. The post has since been deleted but was captured by users before it was removed.
"I usually never open up about my situation in Buffalo, but the fact that this guy has had multiple games with 4-plus interceptions ... and I still don't have a job in the league? ... UNREAL," Manuel wrote.
"Say what you want about me, but never have I EVER done that. Forget a learning curve, I didn't get the luxury of being able to use that as an excuse. I wonder why."
Peterman has played in eight games and thrown three touchdowns against 12 interceptions. Manuel had 20 career touchdown passes and 16 interceptions in his five seasons of service.