Eli Manning is only on this list because of pure availability reasons. The Giants drafted Daniel Jones to be the heir apparent to him, and has looked very good in the preseason. Some fans have cried out for him to start over Manning this season.
Manning would be a veteran guy who has played a lot of football that would be as serviceable backup if Brissett got hurt. Of course, this would be the first time in his career that he would be a backup. But he would be one of the best backups in the league.
The Colts likely wouldn’t have to give up very much for him. Manning is 37 and at the end of his career. He likely only has one year left in him anyway. It would likely cost only a 4th or 5th round pick to get him to come over for a year to be a backup.
This is the least likely scenario for the Colts to do however. They have much better options besides someone who is at the end of their career and who hasn’t played well in the last couple of years. But as far as veteran backups go, you could do worse than a two-time Super Bowl winner.
The next player on this list has a little bit more left in the tank if the Colts needed a veteran backup.