I know the answer to this but I'll ask anyway..Has your 8th grade son beaten every 8th grader he has wrestled this year? If it is a yes then I have no problem with you trying to get him some competition. However if he hasn't then let him compete with kids his own grade/age and see where he is at. Big differences between an 8th grader and a 10th grader as far as maturity is concerned. Not all 8th graders have hit puberty where most if not all 10th graders have, so the strength difference will be a factor. I'm not saying your kid is weak or anything like that, just look at all the factors before doing...