He had 12 rebounds last night! That's a big part of why GS can play small.

It's not just a one-night thing either. Steph at 33 average 1.1 rebounds per game more the Donovan at 25. That's not an athleticism thing, it's an effort thing.

Yes, Donovan expends a massive amount of effort with the rock in his hands. Donovan take the rock to the hoop like a madman! But Steph exerts himself that way every second he's on the court. Maybe Steph has more natural stamina, but he's not as strong nor as quick as DM. I bet his vertical is half of DM's.