The Library of Congress posted a series on Flickr of news photographs from the early 1910's. There are many baseball photos included. This search found most of them. One of my favorites is this one of Hal Chase. Hal was one of the truly evil men to play the game. Just as Jose Canseco was a major vector for spreading steroids, Chase was the big reason throwing games was a problem in the teens. Read Bill James article on Chase in his Historical Baseball Abstract.

Thanks to Adrian Arroyo for the link.