Andrew Luck retires: Let's take a look at the Colts quarterback's injury history in wake of shocking decision
Andrew Luck, Indianapolis Colts quarterback, retires from NFL
Quarterback's decision to step away might inspire others to do the same
Former Colts QB Andrew Luck 'doing better than all of us combined'
Andrew Luck says he's retiring from the NFL - The Boston Globe
Ex-NFL QB Andrew Luck breaks his silence, finally reveals why he abruptly ended football career: report
Andrew Luck's stance on NFL comeback after receiving call asking him to return - Mirror Online
Colts' Andrew Luck retires, in all-time NFL stunner
In Andrew Luck's Retirement, Football's Consequences Weigh Heavily - The New York Times