Buster Keaton shows off his baseball moves in an empty Yankee Stadium in the summer of 1928. Keaton's pantomime on the mound is impressive and he hustles around the bases (he was 32 at the time). The distance to the wall in left-center – beyond the flagpole, seen when Keaton enters – was 490 feet from the plate.
This clip is from "The Cameraman", a silent romantic comedy film, starring Buster Keaton and Marceline Day. Day died at age 91 in 2000 (so she was 20 when she made this film).