Andrew Luck missed nine games in 2015 and struggled when he was on the field for the Indianapolis Colts.

The quarterback wasn't happy with his play and production even before injuries derailed him.

"Injuries aside, I was not playing very good football -- before they happened," Luck said. "I've got to be better. Toward my last couple games, I felt like I was playing much better, trending in the right direction."

In seven games, Luck completed 55.3 percent of his passes (worst mark since his rookie season), had a 15-12 TD-to-INT ratio and a career-low 74.9 passer rating.