| Slim McGrew | |
| Position: | Pitcher |
| Bats: | Right |
| Throws: | Right |
| Birth Date: | 5 August 1899 |
| Birth Place: | Yoakum, Texas |
| Death Place: | Houston, Texas |
| Debutleague: | MLB |
| Debutdate: | April 18 |
| Debutyear: | 1922 |
| Debutteam: | Washington Senators |
| Finalleague: | MLB |
| Finaldate: | June 8 |
| Finalyear: | 1924 |
| Finalteam: | Washington Senators |
| Statleague: | MLB |
| Stat1label: | Win–loss record |
| Stat1value: | 0–1 |
| Stat2label: | Earned run average |
| Stat2value: | 6.60 |
| Stat3label: | Strikeouts |
| Stat3value: | 10 |
| Teams: | |
Walter Howard "Slim" McGrew (August 5, 1899 – August 21, 1967) was a Major League Baseball pitcher. He played for the Washington Senators from to .