Here's the press release on the trade:
The Boston Red Sox today acquired right-handed pitcher Chris Carpenter and a player to be named later from the Chicago Cubs in exchange for a player to be named later. To make room for Carpenter on the 40-man roster, the Red Sox placed right-handed pitcher Bobby Jenks on the 60-day disabled list as he recovers from back surgery.
With the trade, the compensation for Theo Epstein joining the Cubs as the team?s President of Baseball Operations is complete. The transaction has been agreed upon by both clubs.
Carpenter, 26, made his Major League debut with Chicago in 2011 and posted a 2.79 ERA (3 ER/9.2 IP) over his 10 games with the Cubs, all out of the bullpen. He limited left-handed batters to a .143 average (2-for-14) and held opponents scoreless in eight of 10 outings. The right-hander also combined for 32 relief appearances between Chicago's Double-A Tennessee and Triple-A Iowa clubs last year, going 3-4 with two saves and a 5.91 ERA (28 ER/42.2 IP) between the two stops.
Selected by the Cubs in the third round of the 2008 First-Year Player Draft, Carpenter owns a 21-19 record, two saves, a 3.62 ERA (137 ER/341.0 IP) and 289 strikeouts in 96 career minor league games (60 starts) in Chicago?s system. He started 60 of his first 64 professional outings and has appeared in relief in each of his last 42.
Carpenter led all Cubs minor leaguers with a 2.82 ERA (41 ER/130.2 IP) in 2009 and was named an Arizona Fall League Rising Star in 2010.