QB Andrew Luck's retirement is a message for NFL fans to stop treating players like gladiators
Andrew Luck opens up about Colts retirement, biggest regret
Barnwell - The NFL-altering Andrew Luck retirement, and what comes next - ESPN
Colts' QB conundrum: What Sam Ehlinger replacing Matt Ryan means - The Athletic
Why did Andrew Luck retire? Colts QB's decision to end NFL career, explained
Andrew Luck salary: What is the Colts' quarterback giving up by retiring
Indianapolis Colts to Let Andrew Luck Keep $25 Million in Bonuses
Pain and Resentment and the Inspiring Retirement of Andrew Luck
BREAKING: Colts quarterback Andrew Luck retires from the NFL - Pats Pulpit
Laying Blame for the Injuries that Derailed Andrew Luck's Career
Hard Luck decision but we could see Colts superstar quarterback return one day
Andrew Luck retirement was a rational choice - The Washington Post