MLB Pitcher Retires at 28, Says Passion for the Game 'Diminished
Dodgers: Former LA Pitcher Retires from Baseball - Inside the Dodgers
Four-time MLB All-Star announces retirement
Jon Lester, former Cubs, Red Sox pitcher, announces retirement
Former MLB All-Star Chan Ho Park Retires
Veteran right-hander Haren calls it a career
Matt Harvey, former Mets pitching ace, retires at 34
Hideo Nomo announces retirement - The San Diego Union-Tribune
Former Detroit Tigers pitcher Jordan Zimmermann announces retirement
Former Phillies pitcher J.A. Happ announces retirement
Former Oakland A's, Washington Nationals reliever announces retirement
Former Angels Starting Pitcher Announces Retirement From MLB - Los Angeles Angels
After nine MLB seasons, former Mets starting pitcher Matt Harvey announces retirement
Bartolo Colon announces retirement