The Iowa On3 Massey Ratings top 25 list as of Oct. 21 features minimal changes, with only two teams swapping spots. However, there’s a new team at the summit compared to last week’s rankings. Here’s how Iowa high school football’s best teams are ranked, with the playoffs just around the corner. The On3 Massey Ratings, officially used during the BCS era, is a model that ranks sports teams by analyzing game outcomes, strength of schedule, and margin of victory. CLICK HERE to watch your high school’s games on NFHS Network now! 1. Dowling CatholicThe Maroons are on a five-game winning streak after…