what does the CME on white sox uniforms mean

The CME on White Sox uniforms is a jersey sponsor patch, not part of the team name. It stands for CME Group , a Chicago-based financial derivatives company that became the White Sox’s first jersey patch sponsor in 2026.

What it means

CME Group’s logo appears on the White Sox home, road, alternate, and City Connect uniforms as part of a multiyear sponsorship deal. The patch is there for branding and revenue, the same way other pro sports teams use uniform ads.

Why it’s on the jersey

The White Sox and CME Group are both Chicago-based, so the partnership is also pitched as a local business connection. The patch began appearing in spring training and was set to be worn throughout the 2026 season, including regular season and postseason games.

TL;DR

CME on the White Sox jersey = CME Group , a Chicago financial company sponsoring the team’s uniform patch.