Al Mattern
- Given Name
- Alonzo Albert
- Born
- 6/16/1883 — West Rush, NY, USA
- Died
- 11/6/1958 — West Rush, NY, USA
- Weight
- 165 lbs
- Height
- 5' 10"
- Throws
- L
- Bats
- L
- Team(s)
- Boston Doves (1908–1910)Boston Rustlers (1911)Boston Braves (1912)
- Debut
- 1908-09-16
- Final Game
- 1912-04-19
20-Loss Season
1909 · Boston DovesW15L21ERA2.85WHIP1.359