Nacua began his college career at Washington. He played in the first eight games of his freshman season and caught seven passes for 168 yards and two touchdowns before suffering a broken foot.[7] Nacua had nine receptions for 151 yards and one touchdown in three games during the team's COVID-19-shortened 2020 season.[8] Following the end of the season, he entered the NCAA transfer portal.[9]
Brigham Young University
Nacua transferred to BYU for the 2021 season.[10] In his first season, he caught 43 passes for 805 yards and six touchdowns.[11] He had four games going over the 100-yard mark in the 2021 season.[12]
On October 15, 2022, against Arkansas, he had eight receptions for 141 yards and a receiving touchdown to go with two rushing touchdowns.[13] On November 5, in a victory over Boise State, he had 14 receptions for 157 yards and two touchdowns including a game-winning touchdown on fourth and goal to put BYU in front 31-28 with 32 seconds left.[14] In the 2022 season, he had 48 receptions for 625 receiving yards and five receiving touchdowns.[15] He was also used extensively in the running game, carrying the ball 39 times for 357 yards (an average of 9.2 yards per rush) and scoring five touchdowns on the ground during his two seasons at BYU.
Nacua made his rookie debut as a starter for the Rams on September 10, 2023, against the rivalSeattle Seahawks in Seattle. The Seahawks were heavy favorites because the Rams were coming off of an injury riddled 2022 season and the team was without star receiver Cooper Kupp, who had been sidelined with a hamstring injury. Despite this, Nacua was a formidable piece of the team's offense, making 10 catches for 119 yards in his debut as the Rams beat the Seahawks 30–13.[19][20] Though he was first questionable with a rib injury, in his second game, Nacua broke the NFL single-game record for catches by a rookie as he caught 15 passes for 147 yards in a 30–23 loss to the San Francisco 49ers.[21] The 25 catches over his first two games was another rookie record, surpassing Earl Cooper's 43-year-old mark of 19, and he also became the first player to record more than 10 catches and more than 100 yards in each of his first two NFL games.[22]
In a Week 4 game against the Indianapolis Colts, Nacua had nine receptions for 163 yards.[23] Nacua got his first NFL touchdown in overtime on a 22-yard reception to beat the Colts 29–23.[24] During a Week 7 game against the Pittsburgh Steelers, Nacua finished with 154 receiving yards on eight receptions as the Rams lost 17–24.[25] Against the Cleveland Browns in Week 13, Nacua surpassed 1,000 receiving yards on the year with a 70-yard touchdown reception as the Rams won 36–19.[26] In Week 16 against the New Orleans Saints on Thursday Night Football, Nacua caught nine passes for 164 yards with a touchdown and ran twice for 16 yards and was named NFC Offensive Player of the Week.[27][28] Against the New York Giants in Week 17, Nacua caught five passes for 118 yards, including a season-long 80-yard catch-and-run to set up a touchdown in the Rams' 26–25 victory.[29][30] He finished the season with 105 receptions for 1,486 yards, setting new NFL rookie single season records for total receptions (breaking the previous mark of 104 set by Jaylen Waddle in 2021) and total receiving yards (breaking the previous mark of 1,473 set by Bill Groman in 1960).[31][32] In his first career playoff game, Nacua caught nine passes for 181 yards including a 50-yard touchdown in the Rams' 24–23 loss to the Detroit Lions in the NFC Wild Card Round.[33] The yardage total set a new single-game record for receiving yards by a rookie in a playoff game, breaking the previous mark 160 set by Seattle's DK Metcalf in 2019.[34]