P.J. Walker—previously with the Carolina Panthers—entered the NFL in 2020, and since that time, he has thrown 228 pass attempts and managed a passer rating of 63.9 (ANY/A 3.83). His 6.4 yards per attempt have been pedestrian to say the least, but he has played 493 snaps and made 7 starts. In the preseason thus far, he has posted a 14.6 passer rating by going 5/12 for 25 yards with no touchdowns and a single interception.
In that same time, Nathan Peterman has thrown 30 pass attempts and managed a passer rating of 69.3. Not only is this double the passer rating he managed in Buffalo, it is better than what Walker has done in the same time.