[RUKen]

It is not Rabbit Maranville, or any other member of the 1913 Boston Braves. The home uniform of the Braves included a dark cap and an Indian head image on the left sleeve. The road uniform was dark, and the socks were also dark (no white in them). I've pasted below group photos of the Braves in their home and road uniforms. (Edited to add: I do not own these photos.)

The Indian head was on the home uniform sleeve from 1912 into 1915. When the Indian was removed from the sleeve during the 1915 season, it was placed on the chest in place of the B. Prior to 1911, their uniform shirts had collars. There is no Braves uniform from the 1910s that resembles the one in the photo.