The Nationals recalled Henry from Triple-A Rochester on Monday.
Washington optioned right-hander Eddy Yean to Triple-A following Sunday's 11-5 loss to Pittsburgh to clear a spot on the active roster and in the bullpen for Henry. The 26-year-old righty has previously made 10 appearances for Washington this season, logging a 6.00 ERA, 1.67 WHIP and 13:6 K:BB in 12 innings.