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Transactions listed are from November 1 of previous year to April 1 of the following year.
1891
Roger Connor returned by the New York Giants after jumping teams.
Buck Ewing assigned onto roster from the New York Giants.
February, 1891
Sold Jesse Burkett to the Cleveland Spiders.
July 21, 1891 (Standings)
Released Tim Keefe.
July 28, 1891 (Standings)
Purchased Andy Dunning from Manchester (New England).
August 8, 1891 (Standings)
Purchased Bob Barr from Buffalo (Eastern) for $1,500.
November 4, 1891
Roger Connor jumped to the Philadelphia Athletics.