College career
Roach was named to the Big 12 Conference All-Newcomer Team. Roach averaged 7.5 points per game as a freshman. He was suspended for the first game of his sophomore year. As a sophomore, Roach averaged 9.9 points per game on an 11-22 team. Roach was an important contributor for Texas as a junior, taking an important role on offense with guard Andrew Jones lost for much of the season with leukemia. Roach had his own health issues to deal with, playing most of the conference season with a broken hand. He averaged 12.3 points, 3.7 rebounds, 3.6 assists, and 1.5 steals per game. Roach improved his shooting to 43.8 percent from the field and 36.4 percent from three and was an Honorable Mention All-Big 12 selection. Roach lost a tooth in a Big 12 tournament matchup with Iowa State but continued to play and finished with 9 points, 6 rebounds and a team-high 7 assists in the win. In the NCAA Tournament, Roach scored a career-high 26 points in an 87-83 overtime loss to seventh-seeded Nevada. After the season Roach flirted with the NBA draft, but ultimately decided to come back to Texas.
Professional career
Roach joined the Charlotte Hornets for the 2019 NBA Summer League.
On July 27, 2019, Roach signed his first professional contract with BC Körmend of the NB I/A and the FIBA Europe Cup. He was later named to the training camp roster for the Rio Grande Valley Vipers of the NBA G League. On November 30, Roach finished with 22 points, five rebounds, four assists, two blocks and two steals in a win over the South Bay Lakers.
On January 20, 2021, Roach signed with the Wellington Saints for the 2021 New Zealand NBL season.
Roach joined the Los Angeles Clippers for the 2021 NBA Summer League. In five games, he recorded 7.4 points per game, 1.0 assists per game, and 1.8 rebounds per game.
On August 26, 2021, he has signed with Ironi Ness Ziona of the Israeli Basketball Super League (IBSL).
Roach was selected with the 25th pick of the third round of the 2021 NBA G League draft by the Windy City Bulls.
source: https://en.wikipedia.org/wiki/Kerwin_Roach