Boston Red Sox starting pitcher Jon Lester throws to the Texas Rangers during the first inning of a baseball game on Saturday, May 10, 2014, in Arlington, Texas. (AP Photo/Jim Cowsert)
Boston Red Sox's Jon Lester smiles as he walks off the field after retiring the Oakland Athletics in the eighth inning of a baseball game in Boston, Saturday, May 3, 2014. (AP Photo/Michael Dwyer)
Boston Red Sox's Jon Lester pitches in the first inning of a baseball game against the Oakland Athletics in Boston, Saturday, May 3, 2014. (AP Photo/Michael Dwyer)
Boston Red Sox starting pitcher Jon Lester walks off the field during the third inning of a baseball game against the Toronto Blue Jays in Toronto on Sunday, April 27, 2014. (AP Photo/The Canadian Press, Frank Gunn)
Boston Red Sox starting pitcher Jon Lester delivers to the Toronto Blue Jays during first-inning baseball game action in Toronto, Sunday, April 27, 2014. (AP Photo/The Canadian Press, Frank Gunn)
Boston Red Sox starting pitcher Jon Lester delivers to the New York Yankees during the first inning of a baseball game at Fenway Park in Boston, Tuesday, April 22, 2014. (AP Photo/Elise Amendola)
Boston Red Sox starter Jon Lester delivers a pitch during the first inning of a baseball game against the Chicago White Sox in Chicago, Thursday, April 17, 2014. (AP Photo/Paul Beaty)
Boston Red Sox pitcher Jon Lester delivers the ball to the New York Yankees during the first inning of a baseball game Friday, April 11, 2014, at Yankee Stadium in New York. (AP Photo/Bill Kostroun)
Boston Red Sox pitcher Jon Lester delivers the ball to the New York Yankees during the first inning of a baseball game Friday, April 11, 2014, at Yankee Stadium in New York. (AP Photo/Bill Kostroun)