[1] The Class D level Western Pennsylvania League began the 1907 season with eight teams.
The Beaver Falls Beavers, Butler White Sox, Clarksburg Bees, Connellsville Cokers, Fairmont Champions, Greensburg Red Sox, Scottdale Giants and the Latrobe, Pennsylvania team were charter members.
The Cumberland Rooters took its place, but that team moved to Piedmont, West Virginia on June 27, then to Somerset, Pennsylvania on July 11.
[2] Jim Clark, Dick Hoblitzell and Reddy Mack played in the league.
Cumberland (5–20) moved to Piedmont (4–6) June 27, then to Somerset (0–5) July 11.