Bob Irsay moved the team in the middle of the night. When I moved to Baltimore in 1976, the Colts games sold out. By the early 1980s, the team stunk and attendance was low. I saw a few games then. In one game, the only Colts touchdown was on a broken play when the running back (Joe Washington) threw a TD to a receiver (Mike Siani).
The Blu-ray of ESPN’s 30 for 30 on the Colts marching band has a supplement featuring Irsay’s apparently drunken press conference at the airport. He said he wasn’t going to move the team.