Andrew Luck acknowledged Monday that he originally injured his surgically repaired right shoulder during the 2015 season.

Luck and the Indianapolis Colts decided against surgery at the end of that season because they felt like rehab was the best route to go. The quarterback elected to go under the knife this offseason after he aggravated it last season against the Denver Broncos.

"I certainly felt like it was the right decision, which makes it easier and pulling the trigger on it easier," Luck said. "I felt very, very comfortable with the surgeon and his plan and our rehab plan here.

"This wasn't an off-the-cuff thing. I put a lot of thought, effort and plan in moving forward after the season -- talked to a lot of people and got quality information. Honestly, it wasn't too hard of a decision. It felt right."