The Nationals designated Miles Mikolas for assignment on Wednesday, ending a rough one-year run in D.C. and opening a rotation spot for a top prospect making his big league debut the same day.
Mikolas signed a one-year deal with Washington back in February hoping to stabilize a rotation. Instead, the 37-year-old went 3-9 with a 5.82 ERA over 25 appearances and 116 innings, striking out just 11.6% of hitters he faced, one of the lowest marks in the majors, while giving up 27 home runs, third-most in baseball. He's posted an ERA north of 4.78 in every season since 2023, and the stuff finally caught up with him for good this year.
There's a wrinkle here that says a lot about how these moves actually get made. The Nationals reportedly held off on the DFA until Mikolas hit his 10-year MLB service time milestone, which kicked in Thursday, guaranteeing him a full pension and lifetime benefits. The clock on that run started back on May 5, 2012 with the Padres, and the team reportedly marked it with an engraved belt buckle before cutting him loose. Mikolas called it "a pretty long and winding road to get here. A lot of hard work on my part," crediting family and coaches along the way.
Financially, Washington isn't off the hook. Mikolas is still owed the bulk of his $2.25MM base salary, and he'd already banked $200K in innings-pitched bonuses, though roughly $550K in remaining incentives tied to hitting 120-140 innings are now forfeited. If another club claims him off waivers, he'd be entitled to a prorated league-minimum salary of about $780K instead.
Filling the vacancy is 23-year-old lefty Jackson Kent, the Nationals' No. 8 prospect, who made his MLB debut starting against the Cubs the same day Mikolas got the news. Kent earned the call after going 9-4 with a 3.72 ERA and 105 strikeouts across 20 starts split between Double-A Harrisburg and Triple-A Rochester this year. He joins a rotation mix that now includes Cade Cavalli, Jake Irvin and Andrew Alvarez, and he's the fifth Nationals player to debut this season.
For a Washington team still building around its young arms, the move is less about punishing Mikolas and more about opening the runway for the next wave. Whether Kent sticks in the rotation long-term is the bigger story to watch, but for now the Nationals have made their priorities clear: development over veteran innings-eating, even mid-season.