PITTSBURGH -- The San Francisco Giants boosted their bullpen for the stretch run, acquiring veteran left-handed reliever Mike Stanton on Friday from the Washington Nationals for a minor league pitcher.
The Nationals will receive 19-year-old right-hander Shairon Martis, who was pitching at Class A Augusta. Martis threw a no-hitter for the Netherlands against Panama during the World Baseball Classic in March.
Stanton was 3-5 with a 4.47 ERA for the Nationals. He could be valuable in the Giants' push for the playoffs, having pitched in the postseason in 12 of his 18 major league seasons, including six playoff appearances with the Yankees (1997-2002).
Entering Friday, the Giants were third in the NL West, three games behind division-leading San Diego and a half-game behind Arizona.
The trade was announced while Stanton was in Los Angeles with the Nationals to play the Dodgers. He'll join the Giants in Pittsburgh on Saturday, but the team still has to make another move to clear space for him on the roster.
Stanton has appeared in 56 games this year, second-most in the National League. He has 1,083 career regular season appearances, third-most in the majors.
The trade was the second addition in a week to the San Francisco bullpen. Right-hander Vinnie Chulk joined the Giants on July 21 as part of the deal that also brought first baseman Shea Hillenbrand from Toronto in exchange for reliever Jeremy Accardo.