The Seattle Mariners on Thursday unveiled a new sponsor patch they will have on their jerseys for the upcoming season.
The patch will be by Nintendo of America, which is a minority owner of the Mariners. There will be a red Nintendo logo on the left sleeve for the home jersey, and large, red Nintendo Switch 2 patch on the left sleeve for road jerseys.
Our jerseys are leveling 🆙
— Seattle Mariners (@Mariners) March 20, 2025
We are excited to expand our long-standing relationship with @NintendoAmerica, with jerseys featuring Nintendo at home and Nintendo Switch 2 on the road. pic.twitter.com/okPP5QipeE

Call me a purist, but those are just large and ugly patches that clash with the Mariners’ uniforms. The fan feedback seemed to make a similar point, with everyone noting how large the patch is.
Can you make that arm patch 150% bigger please? It's not big enough!
— Cam Nielsen (@CameronNielsen) March 20, 2025
If you are wondering…
— The Markcast® (@the_markcast) March 20, 2025
Yes, that’s the largest sponsor patch I’ve ever seen on a jersey.
Opposing pitchers will be so distracted by the hideous patches that it will produce a 14% increase in batting averages and 22% increases in walks.
— Rain City Cards (@raincitycard) March 20, 2025
MLB teams began allowing sponsor patches on jersey sleeves in the 2023 season after reaching an agreement with the MLB Players Association. MLB teams making the change was part of a movement by American sports leagues to begin allowing the practice after years of keeping jerseys clean and free of ads. The NBA had done the same for the 2017-2018 season. The NHL has allowed ads on uniforms since the 2022-2023 season. The NFL has stood firm though and not gone down the same path, keeping their jerseys clean and unsullied.