Lester, 29, is at the tail end of a five-year, $30 million deal. The $13 million he's set to make in 2014 represents a healthy raise from his $11.6 million salary this season.
After struggling to a 9-14 record and 4.82 ERA in 2012, Lester has seen his numbers improve this season. He has similar strikeout and walk numbers to a year ago, but better home run and batted ball luck has helped Lester improve his record to 13-8 and lower his ERA to 3.86.
Lester was near the top of the American League in strikeouts per nine innings in 2009 and 2010. His whiff rate has since dipped, but he's just two wins shy of 100 for his career and has been a key cog on several contending Red Sox squads.