Thompson was officially called up Saturday to make his major league debut against the Padres, Stephen Gross of the Morning Call reports.
As expected, Thompson got the promotion before Saturday's game and is now set to make his major league debut. He'll face off against Paul Clemens and the Padres. Thompson holds a career 3.08 ERA and 1.20 WHIP in the minors, including an impressive 2016 campaign with Triple-A Lehigh Valley in which he went 11-5 with a 2.50 ERA and 1.10 WHIP over 129.2 innings.