Johnson will stay in the bullpen, Mark Gonzales of the Chicago Tribune reports.
After an injury-plagued 2016 campaign, the Cubs are hoping that a move to the bullpen will keep their pitching prospect healthy while also helping his fastball and breaking pitches to become sharper. Johnson struggled in his first taste of Triple-A last season, but if he can right the ship while maintaining his uptick in strikeouts from last season, he could find his way to Wrigley Field later in the season.