Transactions listed are from November 1 of previous year to April 1 of the following year.
Jack Manning returned to the Boston Red Stockings by the Baltimore Canaries as part of earlier loan.
The Philadelphia Athletics purchased George Bechtel from the Philadelphia Centennials for $1500 (sum was officially paid to entice team to disband).
The Chicago White Stockings signed Cap Anson as a free agent.
The Hartford Dark Blues signed Candy Cummings as a free agent.
Al Spalding jumped from the Boston Red Caps to the Chicago White Stockings.
The Boston Red Caps signed George Wright as a free agent.