Thompson will get his first major league start against the Padres on Saturday, Ryan Lawrence of The Philly Voice reports.
Thompson has compiled an 11-5 record with Triple-A Lehigh Valley over the course of this season, accumulating a 2.50 ERA with a 1.10 WHIP during 21 starts for the club. In his most recent start July 31, Thompson went seven innings, giving up one earned run on four hits while striking out two. He doesn't have a whole lot of swing-and-miss stuff, only recording 87 strikeouts over 129.2 innings with Lehigh Valley, but will get a chance to show what he has against San Diego on Saturday.