The Nationals acquired Stuart from the Mets on Sunday in exchange for outfielder Jesse Winker.
Stuart is in his first full season at the Double-A level and has a 3.96 ERA, 1.25 WHIP and 90:20 K:BB across 84 innings. The 6-foot-9 righty could see Triple-A action by the end of the campaign and may not be far off from his MLB debut, and he should have a clearer path to pitching meaningful innings for Washington than he did with New York.