Why did Andrew Luck retire? Colts QB's decision to end NFL career, explained Unknown 17:18 Andrew Luck was stuck in a cycle full of pain, and he needed to get out of it. Here is more on why the Indianapolis quarterback decided to retire at age 29. Share this Share on FacebookTweet on TwitterPlus on Google+ Related PostsAustralian Grand Prix: Mercedes' Lewis Hamilton takes pole position for season-opening raceFIFA World Cup 2018: Sweden coach Janne Andersson hints he's open to Zlatan Ibrahimovic returning to national teamPremier League: Everton defender Mason Holgate warned by FA over homophobic tweetsCommonwealth Games 2018: Isle of Man cyclist Mark Cavendish to miss event after horrific crash at Milan-San Remo raceAsian Billiards Championship: Pankaj Advani on course to defending title after breezing into finalInternational friendlies: Almost 100 England fans arrested by Amsterdam police for disrupting public order