Nice mature buck.
Considering it's summertime, considering chest depth, ham development, belly sag, shoulder hump, etc,
I'm guessing he's 5 1/2 or older (or more technically, he'll be 5 1/2 or older come fall).
Notice how short his legs appear, although a bit of this comes from the vegetation hiding his feet and lower legs.
This is a classic characteristic of fully mature bucks.