The whole Varsity playing JV isn't recommended and will hurt your ranking come playoff time. I think there was a problem with this last year with Blackville-Hilda playing a JV (or labeled as)team and they changed how they look at it come playoff time.
This ofcourse, is really only a concern in 1A and maybe a select few 2A schools.
But as I was scrolling through some 1A schools, Fox Creek being a new school this year is/has played several JV schools this season that are being counted on their record.
