Here are the pitchers with the shortest time on the South Side that I have a signed ball in my collection:
Tim Stoddard-1 IP in 1975. Went on to have 12 more years in the majors with the Orioles, Cubs, Padres, Yankees and Indians.
Vito Valentinetti-1 IP in 1954. Afterwards, he pitched for the Cubs, Indians, Tigers and Senators from 1956-1959.
Mike Heathcott 3IP in 1998. He struck out 3 in his only game.
Joe Shipley 4.2 IP in 1963. Prior, he had three years with the Giants from 1958-1960.
Don Ferrarese-4 IP in 1960. Overall had an 8 year career with the Orioles, Indians, Phillies and Cardinals from 1955-1962.