What would you do? Need some advice

So I haven't really posted anything of this sorts before but I'm having a tough time dealing with the latest stuff happening on my beer league team. So for context, along with a teammate I started this team 3 years ago and things have been going well for the most part. I've brought some of my coworkers onto the team and some of my other friends so the locker room is a real good vibe. I wear an A on the team and play D, the guy who runs the team wears the C. So this past season, he's brought in a lot of new guys onto the team and he's brought in some guys that are defensemen and he pushed me to play forward. I don't mind the one off, but I feel like he's almost nudged me out of defense because he wants to win so bad. I'm not sure what I should do, do I call him out on this? Do I find another team? A frustrated time.