15. Walter Johnson
- Name: Walter Perry Johnson
- Nickname: The Big Train
- Sport: Baseball
- Born: November 6, 1887
- Position: Pitcher
- Bats: R
- Throws: R
- Height: 6'1"
- Weight: 200 lbs.
- Debut: August 2, 1907
- Died: December 10, 1946
- Team: Washington Senators (1907-1927)