From the ebay item description:
According to the description on his website: "Gordon Bradt and Kinetico Studios produced about 100,000 of these mechanized sports figures between about 1975 and 1985. Some of the sculptures were built with 220volt motors for use in other parts of the world. The sculptures have suddenly resurfaced as collector items, and can be found in auctions and estate sales around the world."
Here is the ebay listing with photograph of Kinetico baseball automaton by Gordon Bradt