Can Hamsters be overweight?

This is my guy Theo! I’m concerned that he may be a bit chunky? I feed him a seed mix and mazuri lab blocks. He is much bigger and chunkier than my female! He also doesn’t run on his wheel very much. I feed him every other day, and the food is always gone, but he’s definitely hoarding a big stash of it. Should I let him eat some of that before I keep feeding him? Is it standard to weigh hamsters? What’s a healthy male Syrian weight! Thanks!