I recently found a baseball-themed clothing button and began wondering if it wasn't off one of those warm-up sweaters players used to wear a hundred years ago. While searching for its provenance - I mean origin, sorry for the pretentious outburst - I ran across a post by Ashley Varela on the topic of hideous baseball sweaters. She shows a dozen that are brutal to behold. The good news is, one of them can be yours for the buying.
The button that started the search.