LOS ANGELES (AP) — Cody Kessler threw two touchdown passes and ran for another score, and Southern California clinched the Pac-12 South title with a 40-21 victory over No. 22 UCLA on Saturday in the 85th edition of their crosstown showdown.Darreus Rogers and Taylor McNamara caught TD passes while the Trojans (8-4, 6-3 Pac-12) scored 20 consecutive points in the second half before raising the Victory Bell in the frenzied Coliseum.