PASADENA, Calif. (AP) — Ty Dieffenbach overcame a left shoulder injury to help No. 4 UCLA remain unbeaten with a rain-soaked, 22-14 victory over Illinois on Friday night.

Dieffenbach left with 35 seconds to go in the first half after he fell hard on his shoulder following a hit by defensive lineman Carter Janki. Third-stringer Madden Iamaleava played the next three series for the Bruins as Dieffenbach remained in the locker room.

Dieffenbach returned with 55 seconds left in the third quarter. He led UCLA on a seven-play, 75-yard scoring drive on his first drive back, capped by a 26-yard touchdown pass to Morgan.

Dieffenbach,was 13 of 20 for 232 yards and two touchdowns. He improved to 5-0 as the Bruins’ starting quarterback.

The senior transfer from Cal Poly became the starter after Nico Iamaleava, the older brother of Madden Iamaleava, sustained a season-ending knee injury against Oregon on Oct. 10.

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