There is no baseline - or indeed any meaning - to what a 10 year old measures (in any facet of baseball skills). At that age, size and early coordination give better "measurables" rather than any early stats.
Just enjoy his playing and work on his skills. At this age, enjoy playing as much catch as you can, helping set baseballs on the tee and soft toss for hitting into a screen, hitting him fly balls and grounders, and begin some batting/pitching lessons.
Enjoy your time with him at this age and try not to get caught up in the fellow parents myths of how to do "it." The time really goes by fast and try not to burn him out.
At that age I tried to do something baseball-wise every day with son - it was our time together (and it lasted 15 more years).
Also, unless his homework is done, there is no baseball (it's never too early to show that academics have higher priority).
PS, when son was that age, I also worried about the same type of stuff you just mentioned. In hindsight, the only important things were our time together, some early lessons, and luckily not burning him out.
Stick around and read lots of archived threads.