The Cubs designated Rodriguez for assignment Tuesday, Meghan Montemurro of the Chicago Tribune reports.
Rodriguez was removed from the 40-man roster to make room for Julian Merryweather, whom the Cubs claimed off waivers from the Blue Jays. The 26-year-old right-hander posted a 3.29 ERA in 14 appearances with the Cubs while registering a 8:9 K:BB over 13.2 innings.