The Nationals optioned Kent to Triple-A Rochester on Saturday.
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.