| Lefty Hopper | |
| Width: | 200px |
| Position: | Pitcher |
| Bats: | Unknown |
| Throws: | Left |
| Birth Date: | 27 May 1874 |
| Birth Place: | Jersey City, New Jersey |
| Death Place: | San Diego, California |
| Debutleague: | MLB |
| Debutdate: | October 10 |
| Debutyear: | 1898 |
| Debutteam: | Brooklyn Bridegrooms |
| Finalleague: | MLB |
| Finaldate: | October 13 |
| Finalyear: | 1898 |
| Finalteam: | Brooklyn Bridegrooms |
| Statleague: | MLB |
| Stat1label: | Win–loss record |
| Stat1value: | 0-2 |
| Stat2label: | Earned run average |
| Stat2value: | 4.91 |
| Stat3label: | Strikeouts |
| Stat3value: | 5 |
| Teams: | |
Clarence Franklin "Lefty" Hopper (May 27, 1874 in Jersey City, New Jersey – September 27, 1959 in San Diego) was an American pitcher in Major League Baseball. He played in two games for the Brooklyn Bridegrooms during the 1898 season.