The Cubs claimed Rolison off waivers from the White Sox on Wednesday, Bruce Levine of 670TheScore.com reports.
It's the fourth organization since November for Rolison, who posted a 7.02 ERA and 25:20 K:BB over 42.1 innings with the Rockies in 2025. The left-hander will compete for a spot in the Cubs' bullpen, but he does have minor-league options remaining.