| Mark McGrillis | |
| Position: | Third Baseman |
| Bats: | Unknown |
| Throws: | Unknown |
| Birth Date: | October 22, 1872 |
| Birth Place: | Philadelphia, Pennsylvania, U.S. |
| Death Place: | Philadelphia, Pennsylvania, U.S. |
| Debutleague: | MLB |
| Debutdate: | September 17 |
| Debutyear: | 1892 |
| Debutteam: | St. Louis Browns |
| Finalleague: | MLB |
| Finaldate: | September 17 |
| Finalyear: | 1892 |
| Finalteam: | St. Louis Browns |
| Statleague: | MLB |
| Stat1label: | Batting average |
| Stat1value: | .000 |
| Stat2label: | Home runs |
| Stat2value: | 0 |
| Stat3label: | Runs batted in |
| Stat3value: | 0 |
| Teams: |
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Mark Anthony McGrillis (October 22, 1872 – May 16, 1935) was a 19th-century American Major League Baseball third baseman. He played for the St. Louis Browns of the National League in 1892. He went to school at the University of Pennsylvania.
He died on May 16, 1935, and was interred at Old Cathedral Cemetery in Philadelphia.[1]