Six years later, Luck spoke to The Athletic about his decision, and he summed up his retirement choice in five simple words: Injuries had robbed Luck of the joy that his favorite thing brought to him, and he needed to step away.

Although Luck acknowledged that he still feels guilty about the end of his Colts tenure, he's fully embraced his new role with the Cardinal.

Former Indianapolis Colts' quarterback Andrew Luck still has guilt about how his NFL career ended with the team. “I’ll always have guilt about how it ended,” Luck said in an interview with Zak Keefer of The Athletic. “I let my teammates down.”