I'm not sure what you can do to be honest. Some kids just play rough. It doesn't sound like he is bullying or being malicious or mean. He's a boy and plays rough. Perhaps get him involved in a hands-on sport - wrestling, martial arts, some rodeo type thing - something where he gets to be physical (outside of just running around).
somehow I manage to leave my intelligence and decorum at the door wherever I go. I doubt your journal will be an exception to that - not on the rug
What the F&#* is a decorum? - Mr. Anthony