The Nationals will call up righty A.J. Cole to start for the club tomorrow, Dan Kolko of MASNsports.com reports on Twitter. A starter was needed with Max Scherzer’s scheduled appearance being pushed back due to a thumb injury.

Cole, 23, opened the year rated as a consensus top-100 prospect. Baseball Prospectus, in particular, is quite high on him, rating him 30th overall. MLB.com, which had Cole in the 52nd slot, praises his “easy velocity,” quality change, improving breaking ball, and overall approach.

It appears that this could be nothing more than a spot start for Cole, given the Nationals’ still-loaded rotation, but it will nevertheless represent his first big league action and first chance to accumulate some service time. In the off chance that he does stick on the active roster, he would be set up to qualify for Super Two status down the line.

Cole was drafted by the Nationals before being shipped to the Athletics as part of the Gio Gonzalez trade. He struggled in one season in the Oakland organization, and was then sent back to D.C. (along with Blake Treinen and Ian Krol) in the three-team swap that sent Michael Morse to the Mariners and John Jaso to the A’s.

He has regained his stock since, obviously, and reached the Triple-A level last year. Across 134 innings in the upper minors in 2014, Cole worked to a 3.14 ERA with 7.5 K/9 and 2.1 BB/9. He has been fairly dominant in three starts in the highest farm level this season, permitting just four earned runs and one free pass while striking out ten in 15 frames.