| Jimmy Wacker | |
| Position: | Pitcher |
| Bats: | Left |
| Throws: | Left |
| Birth Date: | 8 December 1883 |
| Birth Place: | Jeffersonville, Indiana, U.S. |
| Death Place: | Evansville, Indiana, U.S. |
| Debutleague: | MLB |
| Debutdate: | April 28 |
| Debutyear: | 1909 |
| Debutteam: | Pittsburgh Pirates |
| Finalleague: | MLB |
| Finaldate: | April 28 |
| Finalyear: | 1909 |
| Finalteam: | Pittsburgh Pirates |
| Statleague: | MLB |
| Stat1label: | Win–loss record |
| Stat1value: | 0–0 |
| Stat2label: | Earned run average |
| Stat2value: | 0.00 |
| Stat3label: | Strikeouts |
| Stat3value: | 0 |
| Teams: |
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Charles James Wacker (December 8, 1883 - August 7, 1948) was an American professional baseball pitcher for the Pittsburgh Pirates in 1909. He was born in Jeffersonville, Indiana and died in Evansville, Indiana. He is buried in the Oak Hill Cemetery in Evansville, Indiana.