The Chicago Cubs’ pitching staff has recently made changes to Ethan Roberts’ repertoire. A 5-foot-9 right-hander with an inconsistent delivery, Roberts has developed a high-effort curveball with an up-down vertical movement profile. The Cubs are likely to continue the practice in the near future. In the meantime, fans can enjoy his soaring fastball and sharp change-up. The Chicago Cubs have shifted his grip on the curveball since the 2016 season.