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| Monday, October 6th , 1890 |
|---|
| Detroit Dynamos: 1B Paul Buehler retires. |
| Baltimore Clippers: C Cliff Holland retires. |
| Buffalo Buffaloes: 3B Steve Airington retires. |
| Pittsburgh Hornets: Manager Frederic Kennedy leaves the team, his contract was not renewed. |
| Monday, January 6th , 1890 |
|---|
| Detroit Dynamos: Signed manager Ed Peacher to a 5-year, $519 per year contract. |
| New York Imperials: Signed manager Jack Lewis to a 2-year, $97 per year contract. |
| Philadelphia Maroons: Signed manager Fred Knott to a 5-year, $286 per year contract. |
| Brooklyn Bigsbys: Signed manager Albert Friermood to a 3-year, $255 per year contract. |
| Baltimore Clippers: LF Gustav Gray becomes a free-agent. |
| Baltimore Clippers: Signed manager Gustav Gray to a 2-year, $132 per year contract. |
| Boston Brahmins: 3B George Merritt becomes a free-agent. |
| Boston Brahmins: Signed manager George Merritt to a 3-year, $96 per year contract. |
| Pittsburgh Hornets: Signed manager Frederic Kennedy to a 1-year, $98 per year contract. |
