They didn't apply for a trademark until well after the baseball team did.
It's a cash grab because they're barely even operating as is - they've hosted a few competitions but their last season was I believe 2018. They said they started recruiting for a 2022 season the day after the baseball team's announcement - coincidence I'm sure!
Look man, I’m done going back-and-forth with you on this. It sounds like your only experience with this type of thing is reading articles. If that's incorrect, then I apologize. I said it before and I’ll say it again one last time. I work in brand design & development, and I primarily work with college & professional athletes and in professional sports. Everything I do revolves around content rights and intellectual property rights. I’m a creative by profession so I have to have a pretty good understanding of how this stuff works in the real world and not just in theory. I have IP lawyers I work directly with on a regular basis. I’ve personally filed multiple trademarks for my own businesses, and through players and other entities I’ve worked with it’s been 30+ filings on trademarks and copyrights.
Just because the roller derby team didn’t file a trademark initially doesn’t mean that they don’t own or can't claim ownership that intellectual property. There are laws to help protect creators as well as people who start running a business and don’t file a trademark. Can’t repeat myself enough. I’ve even posted direct links to information from USPTO.Gov on the matter.
In fact, I'm dealing with a similar situation right now. As a contractor, I have a company who failed provide me with a valid contract. In my line of work, any contract typically stipulates that as part of the agreement the CREATOR is signing all rights of ownership to the other party. Since there was no contract, it means they were paying me for the SERVICE I provided and not OWNERSHIP of creation, meaning that I still own everything I created for them at this point, they are using it with my permission, and if they want to gain ownership of the work they have to negotiate that with me and it needs to be signed over via a contract. Otherwise, BY LAW I maintain all ownership and can dictate when, how, and where they can use those assets. BUT WAIT! I NEVER FILED ANY TRADEMARKS! SILLY ME!
The same applies to a business, and it is why the trademarking option of "Use In Commerce" exists. The fact is, if you file a trademark, that doesn’t immediately entitle you to ownership. It has to be approved. That means it’s irrelevant in this case who filed the trademark first. Do you even know how long it takes to get a trademark approved? The general answer is 6-10 months, but I currently have one I filed in June 2020 and I’m just now hitting the final stages of the approval process, and that’s without any type of dispute or conflict from a third party. Sure, MLB can likely accelerate things, but trademarking and copywriting isn’t some instant process that the first person to field a claim instantly takes ownership regardless of anything else.
The fact that they were hardly using it is irrelevant. That doesn't give anyone permission to just steal it and use for themselves.