Former Red Sox pitcher, World Series champion Jon Lester retiring, report says
Jon Lester retires
Jon Lester announces retirement after finishing career with Cardinals Midwest News - Bally Sports
MLB Rumors: Jon Lester has retired - Lone Star Ball
Longtime Red Sox ace Jon Lester retires after 16 MLB seasons, Red Sox
Former Cardinal Jon Lester Retires
Former Cubs, Red Sox pitcher Jon Lester announces retirement
Jon Lester announces his retirement after long career with Boston Red Sox and Chicago Cubs - Over the Monster
Jon Lester is Retiring - Bleacher Nation
Is Jon Lester a Hall of Famer? - Last Word On Baseball
Longtime Red Sox ace Jon Lester retires after 16 MLB seasons
Lester Again Makes World Series His Moment - The New York Times
Former St. Louis Cardinals pitcher Jon Lester decides to retire
Should the Cubs retire Jon Lester's number? - Bleed Cubbie Blue