Marquard at the Polo Grounds in 1909. This photo was shot by noted Colliers war photographer J.H. Hare, one of Hare’s few baseball photos. Note the early version of the Michelin Man ad on the outfield wall.
It is very unusual to see a photograph of a locker room during the Deadball Era. This image depicts Frank “Home Run” Baker and Stuffy McInnis in the locker room, likely in Shibe Park in Philadelphia, circa 1913.