Thatcher, 32, has steadily established himself as one of the top lefty specialists in the National League. Since 2007, his percentage of inherited runners scored (19.0) is the league's third-best. He has held left-handed batters to a .218 average (79-for-363) in his career, and he has not surrendered a home run to a NL left-handed hitter since San Francisco's Brandon Belt victimized him on Sept. 22, 2012.
Chris Haft is a reporter for MLB.com. This story was not subject to the approval of Major League Baseball or its clubs.