High school football playoffs have arrived across the state of Michigan, with first-round games set for Friday, Nov. 1. On3 is tracking scores across the Mitten State as hundreds of teams enter the postseason with one goal in mind: hoisting the state championship trophy in a few weeks. The On3 Massey Ratings — which were officially used during the BCS era and have generated college high school sports team rankings since 1995 — rank sports teams by analyzing game outcomes, strength of schedule and margin of victory. CLICK HERE to watch Michigan high school football playoff games on NFHS Network…