Perez was claimed off waivers from Cleveland by the Nationals on Friday, Mandy Bell of MLB.com reports.
Perez spent most of 2021 at the Triple-A level, where he posted a 3.12 ERA, 1.54 WHIP and 36:20 K:BB across 26 innings. However, the 24-year-old also made his MLB debut and allowed three runs on six hits with a 5:3 K:BB across 6.2 frames (four appearances).