Thomas began the season assigned to the triple A Springfield Redbirds, where he was converted back to a starter. He was called up July 1, and immediate made his first start in the second game of a doubleheader with the Phillies. He gave up one earned run in seven innings, but did not figure in the decision. He earned his first win as a starter on August 7 against the New York Mets. Overall, Thomas went 3-4 with a 2.92 ERA and one save mostly in middle relief.