Indianapolis Colts QB Andrew Luck announces retirement from NFL, calls it 'hardest decision of my life'

Indianapolis Colts quarterback Andrew Luck announced his retirement from the NFL Saturday night, bringing an abrupt and shocking end to his once-promising career.

Indianapolis Colts QB Andrew Luck announces retirement from NFL, calls it 'hardest decision of my life'
Indianapolis Colts quarterback Andrew Luck announced his retirement from the NFL Saturday night, bringing an abrupt and shocking end to his once-promising career.