Just a few blocks from Greenlee Field, Ammon Field was home to the Pittsburgh Keystones. The Hall-of-Famer Josh Gibson began his career at Ammon, and in 1996 Pennsylvania erected an official state marker at the site: 2217 Bedford Avenue. It reads: "Hailed as Negro Leagues' greatest slugger, he hit some 800 home runs in a baseball career that began here at Ammon Field in 1929. Played for Homestead Grays and Pittsburgh Crawfords, 1930-46. Elected to the Baseball Hall of Fame, ' 72."