Webb (6-5) took the loss Tuesday against Atlanta, allowing two runs on two hits and a walk while retiring only two batters out of the bullpen.
Manager Craig Counsell said Tuesday that the Cubs have shut down Miller's (elbow) rehab, Meghan Montemurro of the Chicago Tribune reports.
Kelly isn't in the lineup for Tuesday's game against Atlanta.
Pratt is not in the lineup for Tuesday's game against the Pirates due to illness, Sophia Minnaert of Brewers.tv reports.
Frelick is not in the lineup for Tuesday's contest against the Pirates.
Pratt is Ryan Bass of Rays.tv for Tuesday's game against the Pirates.
Anderson (biceps) will begin a rehab assignment Wednesday, Adam McCalvy of MLB.com reports.
Wilson (back) will begin a rehab assignment Tuesday, Adam McCalvy of MLB.com reports.
Woodruff (shoulder) has extended his flat-ground throwing to 105 feet and his readiness for mound work will be re-evaluated at the end of September, Adam McCalvy of MLB.com reports.
Harrison failed to record an out and was charged with four earned runs on four hits in a relief appearance in Saturday's 13-9 win over the Reds.
