| Judge Nagle | |
| Position: | Pitcher |
| Bats: | Right |
| Throws: | Right |
| Birth Date: | 10 March 1880 |
| Birth Place: | Santa Rosa, California, US |
| Death Place: | Santa Rosa, California, US |
| Debutleague: | MLB |
| Debutdate: | April 26 |
| Debutyear: | 1911 |
| Debutteam: | Pittsburgh Pirates |
| Finalleague: | MLB |
| Finaldate: | September 4 |
| Finalyear: | 1911 |
| Finalteam: | Boston Red Sox |
| Statleague: | MLB |
| Stat1label: | Win–loss record |
| Stat1value: | 5–3 |
| Stat2label: | Earned run average |
| Stat2value: | 3.48 |
| Stat3label: | Strikeouts |
| Stat3value: | 23 |
| Teams: | |
Walter Harold Nagle [''Lucky''] (March 10, 1880 – May 26, 1971) was a pitcher in Major League Baseball who played for the Pittsburgh Pirates and Boston Red Sox during the season. Listed at, 176 lb., Nagle batted and threw right-handed. He was born in Santa Rosa, California.
In one season career, Nagle posted a 5–3 record with a 3.48 ERA in 13 appearances, including four starts, one complete game, one save, 23 strikeouts, 12 walks, 60 hits allowed, and 54⅓ innings of work. He later was player/manager of the San Jose Bears in the California State League in 1913.
Nagle wrote a book, titled Five Straight Errors On Ladies Day, about his life experiences including his friendship with baseball legend Ty Cobb.
Nagle died at the age of 91 in his homeland of Santa Rosa, California. (obit in "Santa Rosa Recorder", 27 May 1971)