The White Sox have outrighted right-hander Dylan Covey to Triple-A Charlotte, thus opening up a spot on their 40-man roster, James Fegan of The Athletic reports on Twitter.

A fourth-round pick of the A’s in 2013, Covey spent the first few years of his professional career in Oakland’s system before joining the White Sox in the December 2016 Rule 5 draft. The 26-year-old Covey ended up playing a fairly prominent role in Chicago last season, but he struggled mightily in his first taste of major league action.

Across 70 innings (18 appearances, 12 starts), Covey logged a 7.71 ERA/7.20 FIP with 5.27 K/9 and 4.37 BB/9. While Covey did keep the ball on the ground at a respectable clip (48.5 percent), the fly balls he allowed tended to lead to disaster. In fact, he surrendered 2.57 home runs per nine – the worst mark on the team and the third-worst figure in the majors among those who amassed at least 70 frames.