Seymour gave up one unearned run while allowing one hit with one walk and six strikeouts in five innings Thursday in his debut for Triple-A Durham.
The 22-year-old lefty has flown through the minors in his debut season, logging 35.1 innings at Low-A, 10 innings at High-A and now five innings at Triple-A. All told, Seymour has a 2.15 ERA, 0.77 WHIP and 84:16 K:BB in 50.1 innings (13 appearances). The Rays are well known for moving prospects through the minors slowly, but they have done the opposite with Seymour. He has been particularly dominant of late, striking out 55 while allowing three earned runs over his last 29 innings. At this rate, he could be a factor in the majors down the stretch.