A’s acquire right-hander Rosario from Boston

The Oakland Athletics have acquired right-hander Sandy Rosario

from the Boston Red Sox for a player to be named later or cash

considerations.

The AL West champion A’s cleared room on the 40-man roster by

designating outfielder Jermaine Mitchell for assignment.

Boston claimed Rosario off waivers from Miami on Oct. 17 after

he spent the year in the Marlins organization. He began the season

with a 1.04 ERA in 25 outings at Triple-A New Orleans while

converting all 16 of his save opportunities. The 27-year-old

right-hander joined the Marlins on June 8, posting an 18.00 ERA in

four relief appearances before going on the disabled list June 16

with a strained right quadriceps. He wasn’t back in the majors

after that.

Earlier Wednesday, the Red Sox sent infielder Danny Valencia to

the Baltimore Orioles for cash.