Standings includes only league games, many teams also barnstormed independently from time to time.
Initially, the Cuban X-Giants were included in the league but folded prior to the inaugural 1907 season. The league's members were otherwise constant for its 4-year duration. Rube Foster, Pete Hill, and three other players left the Giants to join the Leland Giants in Chicago. With young John H. Lloyd taking over at shortstop, however, the Philadelphia Giants continued to field an excellent team and won their fourth consecutive eastern championship. In October they toured Cuba and went 10–12–1 against Habana and Almendares.