Help identifying the player in this photo
 

Hello all you experts, I was wondering if anyone can help identifying the player, year, or team in this photo? Thanks in advance!

It appears to me that he has taken off his uniform shirt, and it is laying on the ground in front of him. Uniform is gray or brown with stripes.

My untrained eye tells me that this is a player circa 1915.

Any thoughts?

Thanks,

Greg