That was a 1948 painting that appeared on the cover of Saturday Evening Post on 0/23/49. It is a popular painting. It is also known by three other names – “Bottom of the Sixth,” “Game Called because of Rain” and “Three Umpires.” Bottom of the Sixth was done for Miller Beer in 2001/2002. There are plenty of those on ebay.
I couldn’t find one for Gerz. If you can provide some photos, including markings on the bottom, we might be able to help you more.