John Mercer
- Given Name
- John Locke
- Born
- 1/22/1892 — Taylortown, LA, USA
- Died
- 12/22/1982 — Shreveport, LA, USA
- Weight
- 155 lbs
- Height
- 5' 10"
- Throws
- L
- Bats
- L
- Team(s)
- St. Louis Cardinals (1912)
- Debut
- 1912-06-25
- Final Game
- 1912-06-25
Box score · 1912 · St. Louis Cardinals
Batting
AB1R0H02B03B0HR0RBI0BB0SO0SB0