SAN DIEGO — The Padres swapped struggling pitchers with the New York Yankees, acquiring recently demoted reliever Paul Quantrill for Darrell May and Tim Redding, plus cash.

Quantrill and fellow reliever Mike Stanton became the first victims of the Yankees' roster shake-up when they were designated for assignment Thursday.

Quantrill, a 36-year-old right-hander, was 1-0 with a 6.75 ERA in 22 appearances this year.

"We're getting an experienced reliever who's pitched in the postseason and will add depth to our bullpen," Padres general manager Kevin Towers said Saturday.

Neither May nor Redding was able to solidify the No. 5 spot in the Padres' rotation. May, obtained in an offseason trade with Kansas City, struggled so much in spring training that the Padres obtained Redding in a trade with the Houston Astros.

Although May recently beat Johan Santana and the Minnesota Twins, he was 1-3 with a 5.61 ERA. Redding was 0-5 with a 9.10 ERA. He spent more than a month on the disabled list with a strained right shoulder.

The Padres were expected to fill the open roster spots by activating utility player Eric Young from the disabled list and recalling right-handed reliever Brian Falkenborg from Triple-A Portland. Young dislocated his right shoulder making a catch against the center field fence on April 7 against Pittsburgh.

Quantrill, along with Mike Stanton, was designated for assignment Thursday.