Washington Nationals relief pitcher Andres Machado. Brad Mills-USA TODAY Sports

The Nationals designated right-hander Andres Machado for assignment Sunday, reports Jesse Dougherty of the Washington Post, although the team has not yet announced the move or a replacement for Machado in the bullpen.

Machado, 30, was an oft-used member of the Washington bullpen in 2021-22, appearing in 91 games and pitching to a 3.41 ERA in 95 innings. Those solid bottom-line results came despite pedestrian strikeout and walk rates (18.8% and 9.9%, respectively) and came with a well below-average .261 average on balls in play, contributing to some far less favorable grades from fielding independent metrics (4.56 FIP, 4.45 SIERA).

They also likely aided in the Nationals’ successful effort to pass Machado through waivers unclaimed back in January, when he was designated for assignment after the team signed outfielder Corey Dickerson to a one-year contract. Machado remained with the organization and was selected back to the big league roster at the end of April.

It’s been a tough go for the right-hander since his return. Machado has appeared in 14 games and been clobbered for 16 runs on 25 hits and six walks in 17 innings. He’s punched out just 15.4% of his opponents against a 6.4% walk rate, and opposing hitters have already connected for six home runs — more than half the number he allowed (11) in total from 2021-22.

Machado is throwing harder than ever, averaging 96.8 mph on his fastball this season, but the uptick in velocity hasn’t done him any favors. Machado has seen a slider that ranked as his best pitch in 2021 hit increasingly hard across the past two seasons, which has prompted him to instead favor his changeup as his primary secondary offering. The changeup has been a good pitch for him this year, but his four-seamer, sinker and now-seldom-used slider have all been hit hard.

The Nats will have a week to trade Machado or attempt to pass him through outright waivers. Because he was also outrighted back in January, Machado would have the right to reject an outright assignment in favor of free agency even if he once again goes unclaimed on waivers.

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