Once again, let’s begin with the Getty Images-supplied text with this photo:
First Baseman Tony Perez #24 of the Cincinnati Reds down and ready to make a play on the ball against the Chicago Cubs during an Major League Baseball game circa 1965 at Wrigley Field in Chicago, Illinois.
I can immediately tell you that the year is wrong. The center field bleachers at Wrigley weren’t tarped over with that green artificial turf until 1967.
So it’s got to be after that, and before 1972, because both the Cubs and Reds began wearing the beltless-look pants in ‘72.