Week 5 of the California high school football season will get underway in the coming days, and another round of ranked games are set to kick off. Five matchups between teams in the On3 Massey Ratings California top 25, in addition to a pair of games featuring some of the best in Arizona, are on the docket. Below are the key matchups to watch across the state of California this weekend: 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 …