1. Jake Luton
With the Colts not truly needing another potential starter, but more of a backup, Jake Luton seems to make the most sense for the Colts out of who is available. He has done his fair share of bouncing around practice squads and making active roster appearances since coming out of Oregon State, but he has shown some promise as someone who can stay in the league.
Luton has made some throws here and there that will wow you, and to put him in a Shane Steichen system to help him develop could be a big moment in his career. The 27-year old could just be running out of stops in the NFL, but the Colts could give him a chance to solidify himself throughout practice, as him and Ehlinger would compete a bit for that backup role.
He would most likely end up as the third string quarterback, but to have someone with a decent level of experience, who has done his fair share of learning new playbooks in a short amount of time, could fit this situation pretty well. If anything, he can be a solid practice squad addition, and could prove himself reliable if need be.
He may not have the regular season experience as a Flacco or a Wentz, but he is definitely the cheapest option as the Colts look to give themselves some sort of a security blanket as they continue on without their top draft pick in Richardson.
No matter what they do, Minshew is going to the guy going forward for the year, so adding in a guy that does not put as much pressure on him as a more established quarterback would, is most likely a better situation for the Colts this season, so Luton is the best choice here.