Here's a good recap of the Colt's playoff run:
http://www.ravensnests.com/playoffs/po1968.htm
Johnny Unitas replaced Morrall in the fourth quarter. Unitas had missed most of the season due to an elbow injury. Unitas thought that by halftime he would have been placed into the game by Shula, but for some unknown reason, didn't put Unitas into the game until it was too late.
Johnny Sample, former Baltimore Colt defensive back now playing with the Jets said, "Man, when Johnny came into the game...yea I was worried, anyone but him, but you knew, I knew, if anyone was going to bring a team back, it was him." Unitas, with four completed passes, drove the Colts 80 yards and a touchdown on his first series. Too little, too late.
What did Shula say about why he left Morrall in during the 3rd quarter after Morrall threw an INT into double coverage instead of hitting the wide open Orr for a TD right before halftime?
That recap is pretty inaccurate. Unitas entered the game with 3:58 left in the 3d quarter with the score 13-0 and did not drive the Colts to a TD on his first series. Here's the complete
play by play.
Here's a recap of Unitas' drives:
1) 3:58 left in 3d quarter. Started at own 20. Three-and-out.
2) 13:26 in 4th quarter. Following Jets' FG, Colts start at own 27. Unitas drives team to Jets 25. Throws INT in end zone on 2d down.
3) 6:34 left in 4th quarter. Drives team 80 yards to a TD with 3:19 left.
4) Colts recover onside kick at Jets' 44 with 3:14 left. Unitas drives team to Jets' 19, then throws 3 straight incompletions and Colts turn ball over on downs.
5) 0:08 left in 4th quarter. Completes 15-yarder and time expires.
Unitas' last good season was 1967. His last great season was 1965. 1964 was one of his best years ever and he and his team got destroyed by the Browns in the NFL Championship game. He didn't play all that well in Super Bowl III. So in my opinion the answer to the original question is no.
Shula's biggest blunder was actually letting David Woodley start the second half of Super Bowl XVII instead of Don Strock. Or else it was drafting Eric Kumerow in 1988 instead of Thurman Thomas.