| Lefty Marr | |
| Width: | 175 |
| Position: | Right fielder / Third baseman |
| Birth Date: | 19 September 1862 |
| Birth Place: | Cincinnati, Ohio, U.S. |
| Death Place: | New Britain, Connecticut, U.S. |
| Bats: | Left |
| Throws: | Left |
| Debutleague: | MLB |
| Debutdate: | October 6 |
| Debutyear: | 1886 |
| Debutteam: | Cincinnati Red Stockings |
| Finalleague: | MLB |
| Finaldate: | August 16 |
| Finalyear: | 1891 |
| Finalteam: | Cincinnati Kelly's Killers |
| Statleague: | MLB |
| Stat1label: | Batting average |
| Stat2label: | Home runs |
| Stat3label: | Runs batted in |
| Stat1value: | .289 |
| Stat2value: | 2 |
| Stat3value: | 186 |
| Teams: |
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Charles W. "Lefty" Marr (September 19, 1862 in Cincinnati – January 11, 1912 in New Britain, Connecticut) was a professional baseball player who played outfield and third base in the Major Leagues from 1886 to 1891. He would play for the Cincinnati Red Stockings (AA/NL), Columbus Solons, and Cincinnati Kelly's Killers.