Oner began his career in 2020 as a member of T1 Academy, the developmental team of T1.

[1] In the 2022 LCK Spring Split regular season, Oner was a member of the T1 team that went undefeated in the regular season with a 18–0 record, becoming the first team to achieve this record in the LCK.

[3] Moon and T1 reached 2023 LCK Spring finals, where they lost to Gen.G.

By finishing second place, T1 qualified for the 2023 Mid-Season Invitational as the second seed, where they were defeated 3–2 by JD Gaming and 3–1 by Bilibili Gaming, exiting the Mid-Season Invitational at the loser-bracket final.

T1 won their fourth Worlds title on November 19, 2023, after defeating Weibo Gaming in the finals by 3–0 score.