Getty Images says:
1980s Mike Schmidt Number 20 Batting Phillies And Chicago Cubs Baseball Game Veterans Stadium Philadelphia Pa USA
Well. That’s less articulately phrased than some of the other Getty descriptions I’ve found, and it’s also wrong.
Why? Because both Schmidt and the Cubs catcher are wearing the National League centennial patch on their right sleeve. That means this photo has to have been taken in 1976.
The number on the Cubs catcher is kind of hard to read, but the Cubs used four catchers in 1976: Tim Hosley (6), Ed Putman (8), Steve Swisher (9) and George Mitterwald (15).