Sounds like two separate stories that don't seem to be related, but that's normal: an A story and a B story.
I suppose one shouldn't pray imprecatory prayers against your sports enemies, but gee whiz, praying to win isn't a problem. I remember once asking my Sunday School teacher if it was too trivial to ask God for my team to win, and he said no, you can always ask God whatever you want. If it matters to you, pray for it.
Now, as an adult, of course, I recall the section where Paul said "they ask amiss," where people were praying for (material?) things and not getting them. Yes, one should pray for things that are holy and are in the will of God. But since He doesn't reveal His perfect will to us 100%, it's OK to ask for things that are less clear, such as your team to win.
Kind of a lame story. 2/5. In fact, the only reason it's not bottom-of-the-barrel is because it actually was about the kids.