I would willingly suggest that while there is disagreement among Native Americans, the majority dont appreciate some of the Mascots used by sports teams. And each word is its own case for some, with each holding its own reactions. "Chiefs" dont exist only among NAs, thus the name in and of itself may not be at issue, but the use of a NA image with it might. That name, however, was mockingly used in our history.
Seminole and its use dont offend. The tribe typically endorses its use. But then, the moniker is not derogatory, isnt a misnomer as "Indian" is, and not different from the proper name "Celtic". Blackhawk is the name of an animal, from which a famous NA was named. It isnt owned by NAs, unless a NA image is used with it. Change the image, keep the name.
And your title, "Warriors", again didnt denigrate, nor are NAs even remotely the only folk to utilize the term/concept. Warriors have and do exist in all corners. The image....