Thompson, 22, has a 6.75 ERA and 10:5 K:BB through eight innings for Triple-A Lehigh Valley.
Thompson essentially had one good start and one bad start. He allowed just one earned run in his season debut, then was smoked for five runs on six hits in his most recent outing. While his strikeout rate dipped a little last season, Thompson still had a 1.80 ERA in seven starts at Double-A after being traded as part of the Cole Hamels deal.