All of the 32 NFL teams name captains just prior to the regular season; the Indianapolis Colts are no different in that regard.
The team on Thursday named Peyton Manning (no surprise there) a captain on offense, Gary Brackett on defense, and Adam Vinatieri and Melvin Bullitt on special teams. This would be Manning’s eighth season as a captain, Brackett’s fifth season, while Bullitt and Vinatieri were co-captains last season.