White Sox Claim Ryan Rolison

The White Sox announced that they have claimed left-hander Ryan Rolison off waivers from the Braves. Atlanta designated him for assignment this week as the corresponding move for their signing of right-hander Robert Suarez. The Sox had multiple 40-man vacancies and didn’t need to make a corresponding move.

Rolison, 28, was once a notable prospect with the Rockies. Colorado selected him 22nd overall in 2018, but then his path to the majors proved to be winding. The minor leagues were canceled by the pandemic and then Rolison was held back by injuries, most notably shoulder troubles. He didn’t pitch much from 2021 to 2023, missing the entirety of the 2022 campaign.

He finally got to the majors in 2025 but wasn’t able to put up good numbers. He tossed 42 1/3 innings for the Rockies this year but allowed 7.02 earned runs per nine. His 47.9% ground ball rate was above average but his 13% strikeout rate and 10.4% walk rate were subpar.

He had more intriguing numbers in the minors. In the hitter-friendly Pacific Coast League, he tossed 29 2/3 innings with a 3.34 ERA, 25.2% strikeout rate, 7.1% walk rate and 48.8% ground ball rate.

Despite that solid work for the Isotopes, the Rockies decided to move on. He was designated for assignment last month. Atlanta acquired him in a cash deal but he eventually got squeezed off their roster a few weeks later by further moves.

For the White Sox, it’s a sensible flier. They improved a bit in 2025 but nonetheless lost 102 games and are clearly still in rebuilding mode. That’s not ideal but the upside is that they are better positioned than other clubs to take chances on unproven guys. Rolison also still has an option year remaining, so he could be sent to Triple-A and back throughout the season. He has less than three years of service time, meaning he could be controlled through 2029 if he breaks out in Chicago.

Photo courtesy of David Frerker, Imagn Images