Everybody loves a great underdog story and Perez was sent from Central Casting. Add in the fact he's fluent in Spanish and IMO, you keep him on the practice for the Mexico City game alone. Overall I believe Mannion will be the backup to Goff, however, if Perez shows enough, he could make the practice squad.
The other possibility that I am hoping for is Mannion plays lights out along with Brandon Allen and the Rams trade Mannion for a draft choice, Allen becomes the backup and Perez makes the practice squad. I'm one of the few that like Sean Mannion, however, Allen does have the ability to escape the pocket and the Rams have truly never had a Quarterback that had the ability to do that and for those who will post "Pat Haden.:" I have removed Haden from my memory unless
@jakebogen95 interviews him on a future throwback Thursday.