The Soccer Parents Association is an organization for the parents of kids in the Lakewood Elementary Soccer Team to communicate and have meetings.
It appeared in "Muffy's Soccer Shocker" where the meeting was held at Crosswire Motors. Is is unknown if this is where they always meet, or if they were only meeting there on that day. Likewise, is it unknown if Ed Crosswire is their head member, or if he was the leader that day because they were at his store.
These are the members seen at the one meeting, although it is likely that every parent of a kid on the team is a member.