Colts quarterback Andrew Luck day-to-day with shoulder injury
Andrew Luck says he's retiring from the NFL - The Boston Globe
Sources -- Colts won't recoup money from Luck - ESPN
Colts find themselves at a quarterback crossroads - ESPN
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ESPN: Andrew Luck's Retirement From NFL Comes at 29 - InsideHook
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Colts QB Andrew Luck retiring - Cincy Jungle
Andrew Luck finally reveals why he walked away from the NFL - ESPN