Most men who do co-ed sports league to try to avoid swiping or pure cold approach end up disappointed in the co-ed sports league from a mating perspective.
It’s pretty difficult to swoop into a co-ed kickball, softball, volleyball, or soccer league & directly arrange dates. First, there are more men than women in all these leagues. That's not good from a ratio point of view. Nearly every other guy in these leagues is an unattached guy who is trying to get his penis wet in league because he read some advice article online or in a printed copy of a magazine about doing this. The only exceptions are the men who join teams with their girlfriends or wives. You can make friends in these leagues but chances are that the other men need sex as much as you do. If you’re able to develop a social circle from a co-ed sports league, realize it will take multiple seasons of participation in the league. So you’d better actually like that sport because playing that sport is often the only benefit of it.
If a guy likes in a particular sport and does many league seasons of that sport (spanning multiple calendar years), he might be able to get either social circle-ish opportunities or a direct opportunity at the sponsor bar with a female playing on another team in the league. Same team random relationships also sometimes start, but are rare. Female teammates in a co-ed sports league might be able to give you introductions, which can be helpful.
Most co-ed sports league participants are under 35-40 and its more like under 36 for women.
Co-ed sports leagues can be considered a form of weak social circle game. They are not day game at all. It's not night game either although teams from a league will often congregate at a sponsor bar after that week's games.