 |
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| Friday, October 19th , 1888 |
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| 3B Charlie Morris retired from professional baseball. |
| Tuesday, August 7th , 1888 |
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| Signed free agent LF Gerald Baron to a minor league contract with a major league option. |
| Monday, August 6th , 1888 |
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| Signed free agent LF Al Rosser to a minor league contract with a major league option. |
| Sunday, August 5th , 1888 |
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| Signed free agent LF Chester Krause to a minor league contract with a major league option. |
| Wednesday, April 4th , 1888 |
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| Signed free agent SS Norm Lear to a minor league contract with a major league option. |
| Wednesday, February 29th , 1888 |
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| Signed Scouting Director Joe Merry to a 4-year, $177 per year contract. |
