Getty Images says:
Robby Thompson #6 of the San Francisco Giants gets his throw off to complete the double-play over the top of Greg Maddux #31 of the Chicago Cubs during a Major League Baseball game circa 1987 at Candlestick Park in San Francisco, California.
Right away I can tell you that’s not 1987, because the Cubs weren’t wearing that style of road uniform that year. They were still wearing the blue pullover/white pants on the road in ‘87 and did through 1989.
In 1990 they switched to road grays, but the “CHICAGO” on the front was in a smaller font than what you see here.