The Marlins received a duo of minor leaguers for Haren, shortstop Elliot Soto and right-hander Ivan Pineyro, Clark Spencer of the Miami Herald initially reported this afternoon.
The 34-year-old Haren fills the Cubs' need for starting pitching. The team had shown interest in many options, from David Price and Cole Hamels to Ian Kennedy and Tyson Ross. Ultimately, the team gets Haren, a serviceable righty to bolster the staff.
Haren is a 13-year MLB veteran, coming with some postseason experience. He won't carry the Cubs' staff, but he'll be an upgrade while serving as the fifth starter.
His name has appeared in trade talks over the past few weeks, especially considering that he is a free agent at the end of the year and the Marlins are out of contention.
On the season, Haren is 7-7 with a 3.42 ERA (4.57 FIP) in 21 starts. Over his 129 innings pitched, Haren has a 88 to 25 strikeout-to-walk ratio (3.52 K/BB).