Snapshots!

[RUKen]

The player appears to be wearing a 1913 White Sox uniform. Prior to 1913, the dark uniform was matched with a white cap, and during 1914-1916 the dark cap had white pinstripes. Only in 1913 did they wear a dark cap without pinstripes with their dark road uniform. (In 1926, 1930, and 1931 the White Sox wore dark road uniforms again, but there were some other differences to distinguish them from the one in the photo.) Thirty-seven different players appeared in at least one game for the team that year, and it may be someone who didn't get into a regular-season game.