Just because a child has played a sport for a while, that does NOT mean the child is therefore married to it for life. Many parents seem to feel that way -- "He played starting at age X and has played every season since then and just must play next year, he's committed!" as if it were a job.
You say right up front: "He would prefer to be doing other things." He doesn't care about practicing at home, at all. He likes the social aspect which is nice but is going to cause issues very soon, because the kids there for fun, alas, will be increasingly excluded by other players and adult coaches.
Let him find another sport that he likes. Let him try new things. Let him try something that's not even a sport. Look at your local county or city parks and recreation classes. It does not have to be a team sport, either -- by age 10 many team sports are locked into the better players, the travel teams, etc. He might like golf, which he can play the rest of his life. He might like tennis, which requires only one other person to play, not a team. He might like fencing or bowling....
Have you talked to the parents of your son's friends who play but who, like him, are more social about it and not intensely competitive? I would bet that if you bring it up, you may find that some of them too are saying, "My kid isn't into it and it's getting really competitive and kind of unpleasant and exclusionary." Why not see if they can be bold enough and get out? There is no law that a kid HAS to do any extracurricular. Isn't it possible that your son "does" baseball because that's what he's done iin the past, he's just used to it, and he hasn't tried other stuff he may like as well or better?
I would not worry about "he has committed to the team for next year, he must play" attitudes. Unless he has a passion for the sport and finds the sport itself fun -- and it sounds like it's the togetherness and not the sport itself that he likes -- then ASK him if he wants to try something new instead. Even better if you can get a friend to try tennis lessons or fencing lessons or golf lessons (or computer camp! Whatever) with him.
I think kids get locked into team sports so young now, and parents get so invested in "commitment" to the teams so early, that both parents and kids see only that one activity as the one the child "must" do. There is so much else to try. Your son sounds so nice -- encouraging of others. I would worry that he's going to end up with a sour memory of baseball if he continues to play and is truly excluded and treated poorly because he isn't fiercely competitive. It's fine not to be like that.