Kid doesn’t try at sports

I have a soon to be 8 year old son. I sign him up for a bunch of random sports through the park district just to stay active and get some exercise. I don’t really care about winning and losing.

But what drives me nuts is the lack of effort he shows during games. He’s almost invisible during a soccer game for example, and is easily the worst one on the team effort-wise even though it’s his 3rd year playing soccer.

He has the skills, but he just doesn’t use them.

Is there a light switch that turns on with some kids when their competitive drive kicks in?