| Postseason: |
Won World Series (6-3) over Brooklyn Bridegrooms |

"A Tale of Four Cities" sponsor(s) this page.
This Giants team was involved in one of the most thrilling pennant races of all-time. "A Tale of Four Cities" magically transports the reader back to the 19th-century, bringing the 1889 season to life through both the words and illustrations of the time.
Transactions listed are from November 1 of previous year to April 1 of the following year.
June, 1889 (Standings)
Released Bill George.
July 26, 1889 (Standings)
Purchased Hank O'Day from the Washington Nationals.
1890
Roger Connor jumped to the New York Giants.
Buck Ewing jumped to the New York Giants.
Tim Keefe jumped to the New York Giants.
Jim O'Rourke jumped to the New York Giants.
John Ward jumped to the Brooklyn Ward's Wonders.
March 22, 1890
Obtained Charley Bassett, Henry Boyle, Dick Buckley, Jesse Burkett, Jerry Denny, Jack Glasscock, Amos Rusie and Pete Sommers who was under league control.