Nationals selected the contract of LHP Cionel Pérez from Triple-A Rochester.

Pérez winds up making Washington’s season-opening bullpen as a non-roster invitee after spinning six scoreless frames in Grapefruit League action. The 29-year-old southpaw was a key component of Baltimore’s relief mix over the past four seasons, posting a strong 3.72 ERA across 186 1/3 innings over 212 appearances.