Hard to say. I wouldn't mind seeing the other two in the series.
The shadows all look like they're at nearly the same angle, so maybe the same at bat? The pairs also look really similar. Maybe he was holding two cameras and hit the shutter just a bit apart? Hard to tell really.
I know how it was done in the 1980's though. A friend of mine worked in a camera shop that handled film from one of the globe photographers. He used a 3000 shot roll of 35mm and a camera with auto advance. If I remember it right a Canon AE-1. He had a list of assigned subjects for each game and would just hold the shutter down and let the auto advance do its thing when a player on the list was batting or whatever action they wanted that day. A typical game was 5-6 full rolls, so 25-30,000 images
he figured at least one would be usable. Milestone games or important games like the 78 playoff or Yaz 3000hit or 400hr were two cameras and more film each.
He also had a good feel for some special things and caught a lot of great stuff that wasn't on the list. Players first hits, or first appearances and minor milestones that were unexpected.
I wonder where all those pictures are now? The Globe only took the ones they liked, I think he said 30-100 per game.
Somewhere I have almost an entire home movie reel I took of Yaz grounding out and popping up
I went to something like 12 games in a row and he got hit 3000 the night my parents said enough was enough.
Steve B