| Roy Walker | |
| Position: | Pitcher |
| Bats: | Right |
| Throws: | Right |
| Birth Date: | 13 April 1893 |
| Birth Place: | Lawrenceburg, Tennessee, U.S. |
| Death Place: | New Orleans, Louisiana, U.S. |
| Debutleague: | MLB |
| Debutdate: | September 16 |
| Debutyear: | 1912 |
| Debutteam: | Cleveland Naps |
| Finalleague: | MLB |
| Finaldate: | July 4 |
| Finalyear: | 1922 |
| Finalteam: | St. Louis Cardinals |
| Statleague: | MLB |
| Stat1label: | Win–loss record |
| Stat1value: | 17–27 |
| Stat2label: | Earned run average |
| Stat2value: | 3.99 |
| Stat3label: | Strikeouts |
| Stat3value: | 148 |
| Teams: | |
James Roy Walker (April 13, 1893 – February 10, 1962) was a Major League Baseball pitcher who played for six seasons. He pitched for the Cleveland Naps/Indians in 1912 and 1915, the Chicago Cubs from 1917 to 1918, and the St. Louis Cardinals from 1921 to 1922.