| Bob Valentine | |
| Position: | Catcher |
| Bats: | Unknown |
| Throws: | Unknown |
| Debutleague: | MLB |
| Debutdate: | May 20 |
| Debutyear: | 1876 |
| Debutteam: | New York Mutuals |
| Finalleague: | MLB |
| Finaldate: | May 20 |
| Finalyear: | 1876 |
| Finalteam: | New York Mutuals |
| Statleague: | MLB |
| Stat1label: | Batting average |
| Stat1value: | .000 |
| Stat2label: | At-bats |
| Stat2value: | 3 |
| Teams: |
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Robert Valentine was a Major League Baseball catcher who played for one season. He played for the New York Mutuals for one game on May 20 during the 1876 New York Mutuals season, making him the very first major league player whose career lasted a single game.