Complex sentence: James Gresham played once for Lincoln in September 1889 in the Midland League and moved to Doncaster Rovers for the beginning of the 1890--91 season with Rovers playing in the newly formed Midland Alliance League.
Split into simpler sentences: James Gresham played once for Lincoln in September 1889 in the Midland League and moved to Doncaster Rovers for the beginning of the 1890--91 season. Rovers were playing in the newly formed Midland Alliance League.