Duffey gave up four runs over 6.1 innings with two strikeouts and three walks, but got a no-decision in Saturday's win over Cleveland.
Duffey had been on a roll before the All-Star break with a 2.25 ERA and 19:4 K:BB in 20 innings over his last three starts. His second half begins with a mediocre outing, but his strong finish to the first half of the season should give him stability in the rotation for the near term.