The Indianapolis Colts have a pretty good history of productive tight ends. Dallas Clark is the second-most productive player at the position in franchise history, but he also had Peyton Manning, arguably the best quarterback in the history of the NFL, throwing him the ball. In other words, Clark played with a cheat code.
Jack Doyle was no hack either. He was a fan favorite for a reason. He specifically loved playing for the Colts after spending his college years at Western Kentucky, and he was good. He didn't produce Clark-type numbers, but he was a better blocker.