"Both players are here and ready to go," manager Matt Williams said of Martin and Grace, who received the news of their promotions after Syracuse played Buffalo on Tuesday night. This is the second stint with the Nationals for each.
In 46 games with Syracuse this season, Martin went 5-5 with a 3.21 ERA and 12 saves in 15 chances. He held opponents to a .205 average.
Grace posted a 2.40 ERA in 28 games with Syracuse, piling up 31 strikeouts against just 16 walks. Using a hard, sinking fastball, he induced ground balls 63.6 percent of the time.
Bill Ladson is a reporter for MLB.com and writes an MLBlog, All Nats All the Time. He also can be found on Twitter @WashingNats. This story was not subject to the approval of Major League Baseball or its clubs.