I was a heart-broken 14 year old...although I didn’t live in Baltimore, my Dad had become a Colt fan when watching the 58 Championship game:
“In overtime, New York received the opening kickoff (which was fumbled but recovered by the Giants) but were forced to punt. On their ensuing drive, Baltimore drove 80 yards in 13 plays (all called by QB Johnny Unitas) on a tired NY defense, and scored on Ameche’s 1-yard touchdown run to win the game, 23-17. This drive is known as one of if not the best drives in NFL history.”
http://en.wikipedia.org/wiki/NFL_Championship_Game,_1958
If memory serves, the Colts snuck out of town in the dark of night.