The Pittsburgh Keystones was the name of two historic professional Negro league baseball teams that operated in 1887 and again in 1921 and 1922.
[1] The second club was founded by Alexander McDonald Williams, a Barbadian immigrant and pool hall operator.
[2] The Keystones' home field was Central Park, located in the Hill District at the corner of Chauncey Street and Humber Way.
[3] The park was built by the prominent African American architect Louis Arnett Stuart Bellinger, who would later design Greenlee Field for the Pittsburgh Crawfords.
[4][5] In their first season the Pittsburgh Keystones played as associate members of the Negro National League.