Voth, 23, has a 2.31 ERA and 36:5 K:BB through 35 innings for Triple-A Syracuse.
Voth has picked up right where he left off in 2015, showing standout control along with the ability to miss bats. He doesn't project as a frontline starter, but the Nats will have a hard time not giving him a shot in the rotation if he continues to pitch this way.