Mascots today are costumed performers, but the tradition began with live animals kept by teams as luck charms. The change from one to the other tracks broader shifts in attitudes and in broadcasting.
The word came from superstition
The term entered English from a word for a charm or a bringer of luck, and it was applied to sport at a time when superstition around teams was taken seriously.
A mascot was something a team possessed rather than a performance it staged, and the point was influence over fortune rather than entertainment.
That origin explains why early mascots included animals, children and individuals adopted by teams for reasons that had nothing to do with crowd engagement.
Live animals were the standard for a long time
Schools and colleges kept animals associated with their nicknames, bringing them onto fields, parading them before crowds and housing them between games.
The practice suited institutions whose identity was already built around an animal name, and it produced genuine local traditions around specific creatures.
Some of those traditions continue, maintained carefully and with veterinary oversight, and they are among the oldest continuous customs in American sport.
Welfare concerns changed the calculation
Attitudes toward keeping animals for display shifted substantially, and the noise, travel and crowds involved in a stadium appearance came under scrutiny.
Costs and liability pushed in the same direction, since an animal requires housing, handling, transport and insurance that a costume does not.
Most institutions transitioned to a costumed representation of the same animal, keeping the identity while removing the animal from the arrangement.
The costume enabled performance
A person in a suit can interact with the crowd, appear in stands, perform routines and improvise, none of which a live animal can be asked to do.
That turned the mascot into an entertainer with a character, a set of gags and in some cases a following larger than most players enjoy.
Television accelerated it, since a mascot provides reliable material during stoppages and reads clearly on camera in a way a small animal does not.
Mascots now carry commercial weight
The character appears in merchandise, community programs and advertising, which makes it an asset a club develops and protects rather than a superstition it maintains.
Some nicknames and mascots have been retired after objections to what they depicted, which is a debate about representation rather than about performance.
What began as a charm kept for luck is now a designed property with a personality, a schedule and a legal owner.

