Is my dog’s behavior picked up by his friend?

My 11mo golden plays 3 to 4 times a day off leash in my neighbors fence with his best friend Thor who is 10mo- sometimes Bailey (a 6mo puppy) all at the same time.

Thor and him play VERY rough, 0 boundaries and sometimes they just bite each other really hard. They tackle each other and rough play for probably 1.5 hours a day.

In fact when the 6mo pup gets in on it, they actually had blood all over each other because the puppy pulled out my dogs whisker and bit its own tongue.

Thor is a rescue who had a rough start with no mom and no siblings, so his social skills are a bit askew. He bites hard and shakes his head when they play.

I didn't give it much thought until my dog turned on me yesterday and did that same thing to me, he jumped on top of me (I am 4mo pregnant) and started biting me really hard (making the same demon faces he makes when he plays with Thor) and I could barely get him off of me it was really scary. I now have welts and bruises.

Should I stop him from playing with these dogs? I really need to fix this before the baby gets here (and no, I won't be leaving them by each other EVER. They will always be separated for the baby's safety)

Thanks for any advice, this is our first dog and I was devastated when this happened. It was honestly really scary.