Robertson (illness) was reinstated from the COVID-19 injured list Wednesday, Tim Stebbins of NBC Sports Chicago reports.
Robertson spent a week and a half on the COVID-19 IL, but he played catch Saturday and rejoined the Cubs ahead of Wednesday's series finale against the Pirates. He's converted all five of his save chances while posting a 1.50 ERA and 0.75 WHIP in 12 innings over 11 appearances this year, and he should take over as the team's closer now that he's healthy.