In 2012 with the Minnesota Twins, 25-year-old Canadian lefty Scott Diamond looked to be establishing himself as a reliable starter.
Over 173.0 innings he managed to work a 12-9 record along with a 3.54 ERA and 2.2 WAR. His below-average strikeout tool soon caught up to him, though, and Diamond has spent the last two seasons at the triple-A level trying to claw his way back.
As he tells Greg Mercer of Sportsnet, Diamond is working hard to get his curveball back, which was his strongest pitch during his 2012 success. Working hand-in-hand with his high-80s fastball, Diamond threw the low-80s curveball nearly 30% of the time.