Career
He has played in Major League Baseball (MLB) for the Chicago Cubs and Boston Red Sox and in Nippon Professional Baseball (NPB) for the Tokyo Yakult Swallows. Chicago Cubs
Carpenter was called up to the majors for the first time with the Chicago Cubs on June 14, 2011. He made his debut that day against the Milwaukee Brewers, pitching two-thirds of an inning with one strikeout.
Boston Red Sox
Carpenter was dealt to the Boston Red Sox on February 21, 2012 as compensation for the Cubs hiring then-Boston General Manager Theo Epstein.
Carpenter was designated for assignment on January 22, 2013 to the Pawtucket Red Sox to make room for newly signed Mike Napoli. In 2013, Carpenter proposed to girlfriend, Sarah French on the Love Lock Bridge in Paris, France.
The two met while Carpenter was pitching for the Boston Red Sox and French was covering the Red Sox Centennial as a reporter.