Rucker allowed six runs on four hits across two innings of relief in Monday's loss to the Reds. He walked two and struck out four.
The four strikeouts are about the only silver lining for Rucker, who was otherwise hit hard by Cincinnati in a 14-5 romp for the Reds. The 27-year-old has struggled with a 9.26 ERA across 11.2 innings of work since getting the call to the majors at the end of July, and he's only a low-leverage option for the Cubs at this point.