Stephenson continues to struggle with his command at Triple-A Louisville, and he has conceded that it's become a mental issue for him, the Cincinnati Enquirer reports.

EDGE Analysis

Stephenson has posted disappointing ratios this year - 4.58 ERA, 1.39 WHIP, and 113:68 K:BB over 129.2 innings. He might still get a September promotion, but it's not at all certain that he'll begin 2017 in the majors.