Bagley averaged 10.8 points and 6.2 rebounds per game as a freshman at Arizona State. He was limited to 12 games due to calf and ankle injuries. On April 6, 2021, he declared for the
2021 NBA draft. He maintained his college eligibility and entered the transfer portal. He later withdrew from the draft and announced that he would return to Arizona State for his sophomore season. Bagley was seen on some mock drafts as a late lottery pick or being selected in the middle of the first round. On November 15, 2021, Bagley suffered a knee injury during a 72–63 win over
North Florida. After playing two games in the 2022 season where Bagley was seen as a draft prospect before the season, Bagley was suspended for making comments about head coach
Bobby Hurley after a game against
Northern Arizona. After missing the next five games, he send a tweet explaining why he didn't play. On November 29, 2022, he then tweeted that he got suspended for more games for making the previous tweets. He subsequently tweeted "ATHLETES please please please make a well thought through decision where you go to school. These people will tell you anything to build you up just to tear you down." After a game against
Stanford, Bobby Hurley announced that Bagley had "stepped away" from the team. Bagley during his time at Arizona State was seen as a potential lottery pick but injuries and subsequently departing the team dropped his stock. ==Professional career==