Posted By:
Dan Bretta
A few clues - it appears as though 1914 is the only year this home uniform with that style of hat was used. There is a toe plate on right cleat so he's a pitcher....looks like Spring Training grounds which in 1914 for the A's was Jacksonville, FL - 1913 was San Antonio.
edited to add: It's possible this was a 1915 players since it appears to be Spring Training - I have my suspicions, but would like to hear other opinions first.