LOS ANGELES — Jake Olson, USC’s blind long snapper, made his college debut in the Trojans’ season-opening win over Western Michigan on Saturday when he snapped an extra point late in the fourth quarter. It was a stirring moment. Olson, who lost his eyesight when he was 12 and is a lifelong Trojans fan from Huntington Beach, led USC’s marching band after the game in celebration. On Tuesday, Pac-12 media members named Olson the conference’s special teams player of the week. Olson appeared in his first regular-season game after safety Marvell Tell intercepted a pass from Western Michigan quarterback Jon Wassink, returning it 37 yards for a touchdown with 3:14 left to push USC ahead, 48-31.