I never really played team sports growing up but I did participate in the geek's answer to team sports, theatre. And it fostered just as much camaraderie as the baseball team ever did, perhaps more, because we were all such embarrassing over-sharers. One thing I loved about being part of a group effort like that was the pre-show rituals. There's such a thrilling energy that takes over the room right before a performance. There's a hum of excitement, a twinge of anticipation, and a heady cloud of nervousness. But you're in it together, and that's the important thing. We would always say "break a leg" to each cast member and give each other hugs. Basic, I know, but it was a nice tradition.
It can be hard to maintain that team spirit into adulthood unless you join an adult softball league or improv team. Maybe your team is just you and your dogs. Hey, these memes won't judge.