Voth was claimed off waivers by the Orioles on Tuesday.
Voth began the season in Washington's bullpen but posted a 10.13 ERA and 2.14 WHIP in 18.2 innings before being designated for assignment by the Nationals next week. Although the right-hander will land a spot on the Orioles' 40-man roster, he's unlikely to pitch in many high-leverage situations with his new club.