Kiszla vs. O'Halloran: Might Andrew Luck return to the NFL as quarterback of the Broncos? – The Denver Post
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Catholic QB Andrew Luck leaves NFL in his prime
Laying Blame for the Injuries that Derailed Andrew Luck's Career
Indianapolis Colts quarterback Andrew Luck to retire at age 29
Report: Indianapolis Colts QB Andrew Luck to retire at 29 years of age - Field Gulls
What happened to Andrew Luck? Why did Indianapolis Colts QB retire after just 7 seasons?
Luck announces retirement following Colts loss to Bears
Colts QB Andrew Luck announces his retirement - The Boston Globe