Former New York Mets Ace Matt Harvey Announces Retirement - Fastball
Former KC Royals pitcher Matt Harvey announces retirement
Matt Harvey, the Mets' 'Dark Knight,' retires at 34 Ohio & Great Lakes News - Bally Sports
Orioles sign Matt Harvey to minor-league contract
Former MLB, Mets pitcher Matt Harvey retires: What legacy does he leave? - The Athletic
Former Mets ace Matt Harvey announces retirement: 'Believe me I wish I could have done more'
Matt Harvey Wins NL Comeback Player of the Year - WSJ
Harvey to start All-Star game; Rivera to finish? - The San Diego Union-Tribune
Former MLB pitcher known as 'The Dark Knight' announces his retirement after nine seasons