Following the 2017–18 season, Onyenwere was named to the Pac-12 All-Freshman Team.[1]
In the 2018–19 season, Onyenwere's sophomore season, she was named to the All-Pac-12 team and to the Media All-Pac-12 team, and she ranked second in the Pac-12 for offensive rebounds per game. After that season, she earned on a spot on the 2019 U.S. Pan-American Games Women's Basketball Team.[1]
In the 2019–20 season, Onyenwere was again named to the All-Pac-12 team, along with her teammate Japreece Dean.[2] She was named AP and USBWA Third-Team All-American.[1]
In the 2020–21 season, Onyenwere was named to the All-Pac-12 team for the third year in a row, and once again named AP and USBWA Third-Team All-American. She was also named Top 5 Finalist of the Cheryl Miller Award. Onyenwere finished her college career fourth on UCLA’s all-time scoring list with 1,888-career points.[1]
In her rookie season in 2021, Onyenwere was named in the 2021 WNBA All-Rookie Team and 2021 WNBA Rookie of the Year. She became the first player in franchise history to win the award.[4] Onyenwere was the leading candidate for most of the season, winning every Rookie of the Month award to become just the fifth player in WNBA history to sweep that honor during a season, and fell just two votes shy of winning unanimously. Onyenwere started in 29 of 32 games and was the most productive player in the class by some margin. She averaged 8.6 points and 2.9 rebounds per game, leading all rookies in scoring and 3-pointers made (37).[5]
Onyenwere's role diminished in her second season with the Liberty under new head coach Sandy Brondello. Onyenwere was moved to the bench and started only one game all season. She also struggled with nagging injuries since the start of the training camp, which contributed to her minutes decreasing from an average of 22.2 minutes in 2021 to 13.7 minutes in 2022. With the Liberty acquiring star frontcourt players such as Breanna Stewart and Jonquel Jones before the 2023 season, Onyenwere's roster spot was in question and she was consequently traded.[6][7]
Phoenix Mercury (2023)
On February 11, 2023 Onyenwere was traded to the Phoenix Mercury in a four-team trade involving the New York Liberty, Phoenix Mercury, Dallas Wings, and Chicago Sky.[8] She started 27 of 40 games and set career highs in every category, but it was a disappointing season for the Mercury, who finished 12th in the league with a 9-31 record.[9]
Chicago Sky (2024–present)
On February 6, 2024, Onyenwere was traded to the Chicago Sky alongside Brianna Turner, the 2024 No. 3 pick, a 2025 second round pick (from CHI), a 2026 first round pick, and the right to swap 2026 second round in exchange for Kahleah Copper and the rights to Morgan Bertsch.[10] Onyenwere saw limited playing time in the first half of the 2024 season, but earned a place in the starting lineup after the Olympic break, replacing Marina Mabrey, who was traded to the Connecticut Sun.[11][12]