[Musketeer]

Yes. The Dennis Johnson rule. Basically says no one below 9th grade can play a varsity contact sport. The part I'm not sure about is what constitutes varsity. If playing sophmores and up makes it varsity? Juniors and up? I'm not sure about. I've heard it a few different ways.

According to Khsaa 8th graders can play on Freshman or JV teams as long as there are no student athletes involved beyond the 10th grade.

Students
in grades seven (7) or eight (8) may not participate (practice,
scrimmage or play) on non-varsity (freshman, junior varsity,
etc.) level teams in football or soccer if any member of the
team they are representing or the team they are competing
against is enrolled in any grade above grade ten (10). It is
the obligation of the school desiring to allow the seventh or
eighth grade student to participate with the non-varsity team
to ensure compliance with this provision. Students below grade
seven (7) may not participate (practice, scrimmage or play) on
any high school level team (freshman, JV, varsity) in football or
soccer.