A day after their trade for Rich Harden fell through over reported concerns about his health, the Red Sox traded for another oft-injured pitcher, acquiring left-hander Erik Bedard from the Mariners in a three-team trade that also included the Dodgers, sources confirmed to CBSSports.com.

The deal was completed just before the 4 p.m. ET non-waiver trade deadline.

The Red Sox traded Double-A catcher Tim Federowicz and pitchers Steven Fife and Juan Rodriguez to the Dodgers, who then sent outfielder Trayvon Robinson to the Mariners. Bedard and minor-league reliever Josh Fields go to the Red Sox, who will also send Chih-Hsien Chiang to Seattle.

Bedard didn't make it out of the second inning in a horrible showcase start Friday night, when he came off the disabled list to pitch against the Rays. But the Red Sox obviously came out of that game convinced that Bedard was healthy, and with Hiroki Kuroda and Ubaldo Jimenez unavailable, and with Harden deal having collapsed, the Red Sox took a chance.

The Red Sox had been looking for rotation depth, especially with Clay Buchholz in California to see a back specialist early this week. All five pitchers who began the year in the Red Sox rotation have missed at least one start with a health issue, and Daisuke Matsuzaka is out for the year after Tommy John surgery.

Scouts who saw Bedard before he went on the DL said he was pitching like he did in his prime, when he was a 15-game winner with the Orioles in 2006. The Mariners acquired him from Baltimore in February 2008, in a deal that cost Seattle a package that included center fielder Adam Jones.