Susan was concerned about the background here as it pertains to distracting from the subjects. You really don’t have a choice. So the image is what it is. But if you are thinking about this as you shoot, you might wait another second for the kids to move to the left a bit more. And, no fill flash. You’re too far away. Zoom in more. It will take out the background. Or crop to a panoramic and eliminate the top and bottom distractions. A smaller f stop … f4 or so would decrease the depth of field and make the background an unfocused pattern. There are lots of tricks you can try. But keep in mind that you’re there to see the game and enjoy. Lisa always said that my kids would not recognize me without a camera to my eye. Come to think of it, you said it too.
Lastly, but most important, enjoy yourself. You are not shooting for Sports Illustrated. So have a good time and fire away and make mistakes. My comments are to help. But don’t get too cerebral and not have fun yourself.