Why did Andrew Luck retire? Tragic story of Peyton Manning's

Andrew Luck was the perfect quarterback. He had all the physical gifts and intangibles you'd want in a signal caller, and he was putting up the numbers to back it. And yet, he tragically retired at 29 years old.

NFL: Indianapolis Colts star Andrew Luck retires after 'cycle of injury pain'

Peyton Manning Reflects on Andrew Luck & Reunion with Colts

Peyton Manning is Coming Home - Stampede Blue

Indianapolis Colts quarterback Andrew Luck announces retirement from NFL - The Washington Post

Andrew Luck finds cost of football too pricey to continue career

Peyton Manning, Andrew Luck share common ground beyond Indianapolis – The Denver Post

Andrew Luck opens up about what led to him retiring from the NFL - Sports Illustrated All Cardinal News, Analysis and More

Transcript of Andrew Luck's retirement news conference - ESPN - Indianapolis Colts Blog- ESPN

Ashish Priyadarshi, Author at The SportsRush

FMIA: Andrew Luck, the Colts and the Retirement That Rocked NFL's World - NBC Sports

Stages of Grief: A fan's perspective on Andrew Luck's surprising retirement - Stampede Blue

Andrew Luck speaks candidly on botched shoulder rehab - Yahoo Sports