Aug. 29—SAN LUIS OBISPO, Calif. — It appeared as if Idaho would wrap up a memorable rally and open its season on a high note. Instead, Cal Poly broke the Vandals' hearts on an incredible play in the final seconds. Mustangs quarterback Anthony Grigsby Jr. rolled right and threw up a prayer on fourth-and-8 from the Idaho 34-yard-line, and Cal Poly receiver Tayvion McCoy outmatched his defender ...