Texas A&M (2017-2021) In November 2016, Flagg signed with
Texas A&M to begin his college career. During his freshman season, he played in 30 games and started in 5. He had 4.1 points and 3.4 rebounds per game. Flagg was named SEC Freshman of the Week on December 26th after averaging 16.5 points and 9.5 rebounds. During his sophomore season, he played in and started all 32 games. He led the team in scoring and rebounding and was second in assists. In February 2019, Flagg was named SEC Player of the Week after averaging 20 points, 9 rebounds and 2.5 assists in two wins that week. In April 2019, Flagg announced on his social media that he had put his name in the NBA Draft to test the waters. In May 2019, Flagg tested the
NBA Draft waters, but eventually decided to return to Texas A&M for his sophomore season. During his junior year, he played in 30 games and made 29 starts. In his senior season he played in 17 games and made 8 starts. He finished second on the team in rebounding with 4.5 per game, 39 assists and 6 blocks.
Sam Houston State University (2021-2022) In April 2021, Flagg announced he was transferring to
Sam Houston State University for his final year of eligibility. During his final season, he played and started in 32 games. He averaged 18.6 points, 8.1 rebounds, and 2.2 assists per game. In March 2022, Flagg was named the 2022 NABC Division I All-District Teams. He was voted to the District 6 first team and was the third leading scorer in the
WAC. Flagg was named to the 2021-2022 Lou Henson All-America Team. In April 2022, Flagg was invited to participate in the
Portsmouth Invitational Tournament. Flagg also participated in the Tampa Bay Pro Combine. ==Professional career==