Rainey, who was called up from Triple-A Rochester on Saturday, tossed a perfect inning in relief Sunday in the Nationals' 3-0 win over the Rockies. He struck out the side in the 13-pitch appearance.
Rainey was credited with his ninth hold of the season after blanking the Rockies in the sixth inning during his first outing with Washington since Aug. 12. The right-hander was a key part of the bridge to the ninth inning for the Nationals in 2020, but he's largely struggled on the rare occasions he's been healthy enough to pitch in 2021. Even after his strong showing Sunday, Rainey owns a 7.33 ERA across 27 innings on the campaign.