Leonard Joseph Madden (July 2, 1890 – September 9, 1949) was an American baseball player who played pitcher in the Major Leagues in 1912. He played for the Chicago Cubs.
Len Madden
| Given name: | Leonard Joseph Madden |
| Nicknames: | None |
| Primary Pos: | Pitcher |
| Hght/Wght: | 6'2" / 165 lbs |
| Bats/Throws: | L / L |
| Born: | Jul 2, 1890 in Toledo, OH |
| Died: | Sep 9, 1949 in Toledo, OH (59 years old) |
| Debut: | Aug 31, 1912 |