UCLA senior quarterback Nico Iamaleava will miss the remainder of this season because of a knee injury. This information comes from a source familiar with the situation who is not permitted to speak about it publicly. The injury presents a significant challenge to the No. 12 ranked Bruins, who are 5-0 under coach Bob Chesney’s first season. UCLA has been seen as having a good chance for a spot in the College Football Playoff.
Iamaleava sustained his injury in UCLA’s victory over Oregon. He was running with the ball when he was tackled after being spun around. During the tackle, he grabbed his leg while being hit in the head by Oregon’s Bear Alexander. Although Iamaleava returned for a single play, coach Chesney mentioned in a halftime interview that the quarterback was fine after taking a hit to the quad. However, Iamaleava did not return after halftime, seen later in street clothes.
Before his injury, Iamaleava completed 10 of 17 passes for 162 yards and two interceptions. Over the course of five games, he achieved 982 passing yards, 144 rushing yards, five total touchdowns, and four interceptions.
Following the game, Chesney indicated he thought the injury was to Iamaleava’s thigh, acknowledging it might be more severe and would require further medical evaluation.
During Iamaleava’s absence, senior quarterback Ty Dieffenbach, initially third on the depth chart, took over. Dieffenbach threw for 43 yards and one touchdown, contributing to UCLA’s 17-15 win.
Coach Chesney expressed, “When someone is down, and someone has to step up, their capabilities are either exposed or revealed. In Ty’s case, he stepped up admirably when Nico couldn’t continue, showcasing his grasp of the run game and throwing a crucial touchdown pass.”
Madden Iamaleava, who appeared in two games this season, also stepped in when his brother was previously injured, leading the team against Purdue and Maryland.
Despite Dieffenbach not anticipating leading the offense if Nico went down, the decision to use him was influenced by the game dynamics and his capabilities as a running threat. Coach Chesney noted, “We operate on a weekly basis. This week, we identified the need to run more with the quarterback, making Ty’s strong week of practice decisive in choosing him. Madden is similarly capable, but Ty was favored at this moment.”
Both Chesney and Dieffenbach confirmed that the struggle for the backup quarterback role is ongoing. “Every week, Madden and I compete for the secondary spot,” Dieffenbach said. “Once I was called to play, my focus was solely on executing.”
Before contributing to UCLA’s first win at Autzen Stadium since 2004, Dieffenbach was at Cal Poly in 2025, starting 11 games, achieving 1,305 passing yards, nine touchdowns, nine interceptions, 321 rushing yards, and four scores. His stint there followed two years at Pittsburgh without game action. Transferring to UCLA marked a return for the Agoura High alum who initially played as a receiver in high school before posting 4,153 passing yards and 48 touchdowns in his varsity years.