Freshman year Watson started the 2015–2016 season coming off the bench for the Cornhuskers. In his collegiate debut, Watson played 22 minutes, tallying six points, three rebounds, three assists, and two steals in Nebraska's victory over
Mississippi Valley State. On December 1, 2015, in his eighth collegiate game, Watson hit a game-tying three-pointer with 18.9 seconds left to send the Cornhuskers and then 21st ranked
Miami (FL) to overtime. On December 13, 2015, Watson scored 13 of his career-high 17 points in the second half to lead the Cornhuskers back from an 11-point deficit to defeat
Rhode Island. Watson made his first career start on December 22, 2015 against
Prairie View A&M and has been a fixture in the Cornhuskers' starting lineup since. The Illinois native reached double figures in six of his first 11 conference games, including an impressive 17 point performance in Nebraska's victory at
Illinois. On February 15, 2016, Watson was named Big Ten Conference Freshman of the Week, becoming the first Cornhusker to win the award since
Shavon Shields in February 2013.
Sophomore year Watson opened the 2016–2017 season with a career high 23 points in the Cornhuskers 83–61 victory over
Sacramento State. As a sophomore, Watson averaged 13 points, 3.0 rebounds, and 2.6 assists per game.
Junior year As a junior, Watson averaged 10.5 points and 3.2 assists per game.
Senior year As a senior, Watson averaged 13.6 points, 4.1 rebounds, and 3.1 assists per game. He helped Nebraska reach its second straight NIT. He had five 20-point games and averaged 18.9 points per game in his final nine games. Watson finished his career with 1,532 points, 11th in program history. After the season, he participated in the 2019 Dos Equis 3X3U National Championship. ==Professional career==