9:15am: Washington has announced the move, along with a corresponding decision to designate first baseman/outfielder Jose Marmolejos for assignment. The 25-year-old had struggled at the plate this year at Triple-A.
8:24am: The Nationals are set to select the contract of southpaw Tommy Milone to start tonight’s game. The TalkNats blog first tweeted that it appeared Milone would get the nod, with MLB.com’s Jamal Collier tweeting that was indeed the plan.
Milone will step into the rotation spot opened when Stephen Strasburg was sent back onto the disabled list. While an active roster spot is already accounted for, the Nats also seemingly need to make a 40-man move to accommodate the return of Milone. The veteran southpaw last pitched for the organization in his rookie campaign of 2011.
Milone has compiled 736 2/3 innings of 4.37 ERA ball in his seven seasons in the big leagues, but has struggled in recent campaigns. This will represent his first MLB action of the 2018 season.
Through twenty starts at the Triple-A level on the year, Milone carries a 4.19 ERA over 109 2/3 frames. He’s averaging 9.3 K/9 — well above his typical levels in the majors but right at his career mean at the highest level of the minors — along with a characteristically minimal walk rate of 2.0 BB/9.

That signing ended up being a nice bargain for the Jays, culminating in this flip of the 36-year-old for some prospect capital. Oh has posted a 2.68 ERA, 10.5 K/9, and 5.50 K/BB rate over 47 innings for Toronto, looking far more like his “Final Boss” form from the 2016 season (his first year in Major League Baseball) than his less-impressive 2017 edition. The advanced metrics have been pretty sold on Oh’s performance, as his .266 wOBA is nearly identical to his .264 xwOBA, and ERA predictors (3.03 FIP, 3.77 xFIP, 2.91 SIERA) mostly back up that impressive 2.66 real-world ERA.