The Cubs made a minor roster move on Friday, promoting right-handed reliever Dillon Maples from Triple-A Iowa. In a corresponding move, the team demoted left-handed reliever Randy Rosario to Iowa.
Maples has pitched in parts of two seasons with the Cubs from 2017-18, holding a 10.97 ERA in 15 appearances. The 26-year-old has struggled with his command at the big league level, walking 11 batters in 10 2/3 innings. He has struck out 20 batters over that span, however.
Maples has fared well in Triple-A this season, posting a 3.38 ERA in seven appearances (eight innings). While he has walked eight batters, he has 16 strikeouts and opponents are hitting a measly .