San Francisco Giants at Kansas City Royals

Oakland Athletics at San Francisco Giants

Oakland Athletics at San Francisco Giants

This 1999 interleague game in San Francisco featured the Giants and A's wearing their 1979 uniforms.

San Francisco Giants at Oakland Athletics

San Francisco Giants at Pittsburgh Pirates

BurghFan tell us of this game, one of the first Turn Back The Clock games:

Pirates and Giants threw back to 1939 on 5/31/92. Link 1, Link 2.

from the Beaver County (PA) Times, June 1, 1992:

from the Spartanburg (SC) Herald-Journal, June 1, 1992:

Philadelphia Phillies at San Francisco Giants

The Giants and Phillies played in 1942-style uniforms.

Chicago Cubs at San Francisco Giants