Covey, who struggled during his first season as a White Sox player with a 0-7 record, has shown improvement this past season by dropping his ERA from 7.71 to 4.95.
The use of his curveball appears to be an effective feature when Covey showcases it in his repertoire.
Without the curveball
On June 29th and July 4th against the Rangers and Reds, respectively, Covey had two of his shortest appearances this year (both losses). According to Baseball Reference, he threw just 74 pitches against Texas in 2.1 innings while giving up 8 hits, 9 earned runs, 3 walks, and not a single strikeout.