I'm reading a book about the first 20 years of the Yankees and came across Nick Altrock, who was kept around into his 50s as a player who was allowed to play a couple times a year, basically as a jester. He hit and pitched.
This might be the weirdest Fangraphs page I've ever seen.
https://www.fangraphs.com/players/nick-altrock/1000191/stats?position=PB