B.R.
I'm sorry that you're going through this. My son is 2 and has been hitting for a while. I was constantly putting him in time out and even in his crib in his room. However, I realized just the other day that now that it's been nice and they've been able to play outside almost everyday I haven't had to get after him for hitting. I did today but it was near his naptime. Now that it's nice, get him outside and running around. Wearing off that extra energy will help, especially if he gets to play with you.