O'Neill is expected to be called up by the Cardinals prior to Thursday's game against the Cubs, Joe Trezza of MLB.com reports.

EDGE Analysis

O'Neill has been scorching hot at the Triple-A level to open the 2018 season, hitting .388 with a 1.222 OPS and six home runs in just 12 contests. The 22-year-old wasn't able to show his potential in spring training as he dealt with a strained oblique and then a hamstring strain which limited him to just seven games in the Grapefruit League. O'Neill will provide added depth in the Cardinals' outfield moving forward and is expected to take the roster spot of a reliever when the move occurs Thursday.