John McGraw image by The Pictorial News Co. in 1903. Used in McGraw’s Science of Baseball books in the mid 1900s.

Walter Johnson warming up at the Polo Grounds in New York circa 1912. The image is by Charles M. Conlon.

This image depicts Christy Mathewson, likely in Spring Training, in cicra 1904 to 1906. The uniform he was wearing was only used in 1904 and 1905. The postcard back is undivided which means prior to early 1907. Note the medicine ball at his feet.

Chief Flynn circa 1912.

Ray Collins at Spring Training in Hot Springs, Arkansas in 1915. Photo by G.T. Murray.

Tris Speaker at his farm in Hubbard, Texas in the 1910s.

One of the better portraits of Keeler. Taken in the 1900s, but printed in the 1920s by International Newsreel.

Tris Speaker circa 1910.

Frank Chance at the batting cage at Spring Training in Houston, Texas in 1914. Photo by Brown Brothers.

Roger Bresnahan and Jimmy Archer of the Cubs at the Polo Grounds in New York in 1915. Photo by Underwood & Underwood.

Intense photo of Collins circa 1910. From the Detroit News files.

Casey Stengel in circa 1916 in the early years of his career.