I'm assuming Kosko will be the final athlete they can do this with and still have him wrestle in junior high / middle school. New rule since 2023 gives 6 seasons of sports participation after 6th grade, or 4 years of school after 8th grade. So, if you're competing for any school in 7th and 8th grade, any holding back at that age means you lose a year of HS eligibility. Once you graduate 8th grade, then your 4 years starts counting, so you can't repeat 8th grade (doesn't matter if you compete or not) and still retain your 4 years of high school.