The San Diego Padres acquired right-handed reliever Bryan Corey of Thousand Oaks from the Boston Red Sox on Sunday for a player to be named or cash.

To make room on the roster, the Padres optioned left-hander Joe Thatcher to Triple-A Portland.

Corey was outrighted to Triple-A Pawtucket on April 30 by the Red Sox. He had a 10.50 ERA in seven relief appearances during two stints with the Red Sox this season. The 34-year-old appeared in five games in relief over two stints with Triple-A Pawtucket, with one save.

He also has played with the Arizona Diamondbacks, Los Angeles Dodgers and Texas Rangers.

Brewers pull Gagne from closer's role: The Brewers yanked Eric Gagne from the closer's role after the reliever called his latest performance embarrassing and said he didn't feel he deserved to pitch the ninth anymore.

Manager Ned Yost said he read Gagne's comments and will use a closer-by-committee approach while Gagne takes what Yost called a "mental break."

"He's really pushing himself really, really hard and taking it really, really hard," Yost said. "We'll probably just mix and match, I'm not going to do anything crazy."

Gagne, who signed a $10 million, one-year contract with the Brewers days before the Mitchell Report on performance-enhancing drugs included his name, said after Milwaukee's 5-3 loss on Saturday that he wanted to keep pushing through, but he didn't deserve to close.

Gagne (1-2, 6.89 ERA) has nine saves, but is tied with Cardinals reliever Jason Isringhausen for the major league lead with five blown opportunities.

Brewers starter Gallardo to have surgery Tuesday: Brewers starter Yovani Gallardo will have surgery on Tuesday to repair a torn ligament in his right knee and will likely miss the rest of the season.

Gallardo said there was no chance he could avoid having surgery on his anterior cruciate ligament and he will complete his rehabilitation in Milwaukee. He hopes to return in September or October, but players typically need four to six months to recover.

Rangers' place Millwood on 15-day DL: The Rangers placed right-handed pitcher Kevin Millwood on the 15-day disabled list with a strained right groin.

The Rangers called up right-hander Doug Mathis from Triple-A Oklahoma to take Millwood's roster spot.