BCSNN — Ninth-ranked UCLA will have to navigate the remainder of its unbeaten season without its starting quarterback. Head coach Bob Chesney announced Monday that Nico Iamaleava will miss the rest of the 2026 campaign and undergo surgery for a knee injury suffered during the Bruins’ victory over Oregon.

“It’s severe,” Chesney said, adding that surgery was scheduled for either Monday or Tuesday.

The injury occurred late in the first half of UCLA’s 17–15 win over then-No. 13 Oregon on Oct. 10. Iamaleava scrambled on a play before being tackled by two Oregon defenders, with his left leg becoming twisted during the collision. After briefly returning to the game and throwing an interception before halftime, he did not play again.

The news delivers a significant blow to a UCLA team that has emerged as one of the nation’s surprise contenders. The Bruins sit at 6–0 overall and 4–0 in Big Ten play, carrying both a perfect record and a Top-10 ranking into the second half of the season.

Iamaleava’s numbers this year do not fully reflect his impact on the offense. The former Tennessee transfer threw for 982 yards, four touchdowns and four interceptions, while adding 144 rushing yards and a touchdown. More importantly, he helped guide UCLA through a difficult early schedule and into national relevance.

The injury marks an unfortunate setback in Iamaleava’s second season in Westwood after transferring from Tennessee. The former five-star recruit arrived with enormous expectations and had become one of the most recognizable figures on the Bruins’ roster.

Now the spotlight shifts to Ty Dieffenbach, who stepped in following Iamaleava’s injury against Oregon and made his first career FBS start in last weekend’s 17–7 victory over Wisconsin. The backup quarterback responded impressively, completing 22 of 33 passes for 264 yards while helping UCLA remain unbeaten.

Dieffenbach’s performance offered encouragement, but replacing a veteran starter during the heart of conference play presents a different challenge. UCLA’s margin for error shrinks considerably as the schedule intensifies and opponents begin targeting the Bruins as one of the Big Ten’s top teams.

Despite the loss of its starting quarterback, UCLA has demonstrated an ability to win close games. The Bruins survived Oregon by two points and followed it with a disciplined road victory over Wisconsin, showing a formula built around defense, ball control and complementary football.

For Chesney and the Bruins, the focus now becomes adapting rather than dwelling on what has been lost. The season’s goals remain in front of them, but they will be pursued with a new signal-caller under center.

UCLA returns to action Saturday when it hosts Michigan State, looking to remain unbeaten and continue its rise in the national rankings.