Getty says:
Chicago Cubs Ron Cey is welcomed at the plate after hitting a three run homer in the fourth inning of the Cubs-Pittsburgh Pirates game. Cey is greeted by teammate Leo Durham.
Ron Cey? Check. Leon Durham? Check. Cubs playing the Pirates? Yup, but when?
This one was pretty simple. Once we know it’s a three-run homer in the fourth inning against the Pirates, going to Cey’s home run log at baseball-reference gives us the answer. There is only one homer of Cey’s 84 as a Cub that matches this description.