Ott had five 100-yard rushing games as a freshman at Norco High School. Chuck Chastain recalls the exact moment he knew Jaydn Ott would be special. Chastain is the head coach at Norco High School in Riverside County, and Ott — now a freshman sensation at Cal — was a backup freshman on the Cougars’ 2018 team. Norco was playing Vista Murrieta in an early-season game and the Cougars’ two senior running backs both became injured and unable to play. This was Ott’s moment. “He ended up breaking away and scoring the winning touchdown,” Chastain said. “You could see when…