Choi attended Kyungbock High School and was classmates with Lee Jong-hyun.

Choi was considered one of the "big 3", along with Lee and Kang Sang-jae, of the 2016 KBL rookie draft and strong contenders for the first pick of the first round.

[8] After a 2018-19 season mostly plagued by injury, he returned to the side but found himself having to battle with veteran Kim Sun-hyung for a spot in the starting 5.

On December 8, 2020, it was reported that Choi had been suspended for three games by his team after he accidentally leaked a nude photograph of his teammate on his social media.

[9] The KBL further extended the suspension to five games and fined him 3 million won.