Jon, appreciate the info. I use the Af-on button for sport and birds with pretty much the same settings. No AF-on button on the D7000 but supposedly a work-around using the AE-on button(some disagreement on that one ).
How well I know that the burst does not guarantee bat-on-ball but cricket is a bit slower than baseball and I am learning to anticipate better Getting the bales flying is a bit easier unless it is a full toss. Just start the burst as the ball bounces of the pitch. So far only shooting high school aged cricket so hopefully will get better by the time I shoot the big guys .
The AF looks like it will work for daytime soccer but not sure about the small birds in flight but my son normally shoots raptors/Egrets/Herons in flight and they can be pretty easy. Cheers, Tom