Pittsburgh Press Baseball league 1921 & Fry Pumps 1925

My grandfather was on this team. Is there any history on the industrial leagues? I remember him talking about playing the Major league teams of the times while came through town on trains. He also play for Fry Glass co. (Fry Pumps) but I have found no information about thier team. There is alot about old companies but very little or none about thier sports teams. The pendent has 1925 on it and actual have a photograph of team.