Kent has given up nine earned runs in 10.1 innings across his last five appearances at Triple-A, but he'll return to the big club as the replacement for the injured Matt Waldron (chest). Kent owns a 6.28 ERA and 1.74 WHIP in the big leagues this season and will likely be limited to middle-relief duty.

The righty reliever has been mediocre during two stints in the majors with Washington since being claimed off waivers from the Minnesota on May 3, posting a 6.75 ERA, 1.50 WHIP and 9:2 K:BB across 10.2 innings over eight appearances. The Nationals claimed lefty reliever Matt Krook off waivers from the Athletics on Saturday and will have him fill Kent's spot in the bullpen.