The A’s dealt left-handed reliever Marc Rzepczynski to the Washington Nationals Thursday morning, getting a minor league infielder, Max Schrock, in return.
The A’s also sent $500,000 to the Nationals to complete the trade.
Oakland, which flies to St. Louis Thursday to begin a three-game series against the Cardinals starting on Friday, will have to make a roster move to fill in with Rzepczynski’s departure.
Rzepczynski began the season as the A’s lefty-on-lefty reliever out of the bullpen and had pitched in 56 of the A’s 127 game with a 1-0 record and 3.00 ERA. His ground-ball rate has been the second-best in the majors behind Orioles’ closer Zach Britton.