Duffey gave up five runs on 10 hits with six strikeouts and one walk over 4.2 innings in Tuesday's loss at Oakland.
Duffey has given up 16 runs and 28 hits over 17.1 innings in his last three outings. He's in danger of being sent to the minors if he has another poor outing. He has a 13:4 K:BB ratio in his last three starts, but has given up too many hits.