Los Osos’ 52-21 upset victory against previously No. 2-ranked Rancho Cucamonga has thrown a wrench into The Sun’s prep football rankings. The victory catapulted the Grizzlies (5-1) from eighth to fifth in this week’s rankings and dropped Rancho Cucamonga (4-2) to eighth. Meantime, Colton’s impressive 50-12 victory against Redlands kept the Yellowjackets (5-1) at No. 1. Redlands is an unranked team that led Los Osos 20-0 in the first half of its game before losing. Chino (5-1) defeated Diamond Bar to stay at No. 2. AD Quality Auto 360p 720p 1080p Top articles1/5READ MOREWalnut’s Malik Khouzam voted Southern California Boys Athlete of the Week Redlands East Valley (5-0-1) struggled against Eisenhower before subduing the Eagles 29-15 to move up to No. 3. Chino Hills downed Ganesha 43-6 and moved from fifth to fourth. Serrano made the long trek to Ridecrest to play its annual nonleague game with the Burros and stormed back from a 27-10 deficit to edge coach Jeff Steinberg’s team 30-27. That kept the Diamondbacks at No. 6. Upland (5-1) also stayed put following a 38-17 victory against No. 10 Alta Loma. Kaiser (4-2) pummeled Jurupa Valley 56-7 to stay at No. 9. Finally, Alta Loma retained the 10th spot, despite its loss to Upland, but has the likes of Sultana and Chaffey (both 5-1) breathing down its neck. Sultana, which has been building for this season for two-plus years, will make its Top 10 breakthrough bid at Serrano on Friday night in a Mojave River League game. Rk. School (record) previous 1. Colton (5-1) 1 2. Chino (5-1) 3 3. REV (5-0-1) 4 4. Chino Hills (6-0) 5 5. Los Osos (5-1) 8 6. Serrano (5-1) 6 7. Upland (5-1) 7 8. Rancho Cucamonga (4-2) 2 9. Kaiser (4-2) 9 10. Alta Loma (5-1) 10 160Want local news?Sign up for the Localist and stay informed Something went wrong. Please try again.subscribeCongratulations! You’re all set!