Kool... definitely up the ISO and Up the shutter speed - you will probably see a little more noise easily removed in Post Processing, but getting the shutter speed up should help sharpen things up a bit.

If you can add a speed light to act as fill and stop action that would help as well.

FWIW - I shoot with a D7100 myself, and have shot between 3200 & 5000 ISO indoors to get the shutter up high enough to stop action. I make use of Lightroom and Topaz Denoise if I need to eliminate noise.

Hi Frank, this is a nice set.
I really like the color pop you made in the first one.
I think if you cropped out the Catcher it would put your boy slightly off center and really make the eye focus on the batter and HIS focus on the ball.
the first grand in the tree is a little soft and the background distracting...the second one is much better. She appears sharper. If you know how, you can improve it by removing the twig pushing into the top of her head.
The boy looking up to make his catch is wonderful...could be better if you removed the foot entering right...a crop would do it.
My favorite of the set is the last one. Lovely lighting, great intensity on both boys faces, ACTION captured and excellent DOF. Keep em coming......and enjoy the games.

I'm using a D7000 and have tried to get shots of my Grandson with a Nikon 18-200, Nikon 70-300. I have had better luck with a Nikon 50 1.8 but the lighting of these indoor matches still baffles me. I'd like to use a 70-200 F2.8 both for the zoom and the F2.8 capability but the cost of a Nikkon lens is steep to me at this time. Wondering if the Sigma and Tamron 2.8 versions would be almost as good or even go with a Nikon 70-200 F4 or the Tokina F4 version.

He going for State in 2 weeks so I'm in a bit of a rush.

Thanks, Bill