Back near the time of the 2016 NFL Draft, Sports Illustrated ran a story telling the extensive oral history of the 2011 Draft. The story didn't really receive as much attention at the time as it was overshadowed by this year's draft (understandably so), but the story did contain an interesting tidbit about the Colts.
NFL Films senior producer and analyst Greg Cosell was one of those interviewed for the story, and he said that the Colts were deciding between tackle Anthony Castonzo and quarterback Andy Dalton in 2011. Here's what Cosell said:
Castonzo was taken in the first round by Indianapolis [at 22].