LOS ANGELES (AP) — Southern California linebacker Porter Gustin will miss the rest of his senior season after fracturing his right ankle.

Coach Clay Helton said Sunday night that Gustin was hurt in the final moments of the Trojans' 31-20 victory over Colorado on Saturday night.

Gustin had made a strong return to USC's starting lineup this season after appearing in just four games last year, missing the Pac-12 title game and the Cotton Bowl due to injuries.

He leads the Trojans with seven sacks and 10 tackles for loss, and he is their third-leading tackler overall. The rest of the defense has just six sacks combined.

USC (4-2) has won three straight heading to a showdown at Utah (4-2) on Saturday. Gustin is from Elk Ridge, Utah.

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