The Ripple Effects of Andrew Luck's Sudden NFL Retirement - The
Robert Griffin III discusses Andrew Luck's retirement - The
Indianapolis Colts quarterback Andrew Luck to retire at age 29
Andrew Luck Announces Retirement
Andrew Luck retirement: ESPN writer discusses former Colts quarterback
Andrew Luck finally reveals why he walked away from the NFL - ESPN
ESPN: Andrew Luck of Colts Retiring From NFL at Age 29
Andrew Luck finally reveals why he walked away from the NFL - ESPN
Luck retires, calls decision 'hardest of my life' - ESPN