[2] In the 1903 season, the teams in Chanute and Jefferson City folded.
The teams from Leavenworth and Webb City folded mid–season on July 16.
Joplin, Leavenworth, Sedalia, Springfield, and Topeka all joined the new 1905 Western Association.
The Fort Scott and Pittsburg franchises remained in the 1905 Class C level Missouri Valley League.
Muskogee disbanded on August 31, causing the Missouri Valley League to end on September 5.