The Cubs designated Pomeranz for assignment Monday, Patrick Mooney of The Athletic reports.
Pomeranz latched on with the Cubs earlier this month after being released by the Angels, but he fared worse during his time with the Northsiders. Between the two stops, the lefty holds a 5.59 ERA and 17:16 K:BB over 29 innings this season. The 37-year-old Pomeranz could have to accept a minor-league contract if he wants to continue pitching.