Nope. And im sorry to say that i dont think there are any. 16u is competitive, and you wouldnt be able to play any tourneys with no softball on sundays. However fall ball teams might not play on sundays. But i dont think any dont play on sundays for spring ball.

I have 2 sisters on my team that won't play on Sunday for religious reasons. This is fine with me and I respect them for it. However, they will never advance because elite play requires Sunday play.