Lefty Lester announces retirement
Former Cubs pitcher Jon Lester, part of team's World Series core
Victorious Night for Lester in His Return From Cancer - The New
For '08 Sox, no shortage of talent in the rotation or bullpen
Thank you Jon Lester
Former Red Sox pitcher, World Series champion Jon Lester retiring
Jon Lester, Baseball Wiki
Jon Lester retires: Former Red Sox, Cubs ace concludes 16-year
Job became more personal with Jon Lester in need - The Boston Globe
Boston's Lester has treatable lymphoma