2020 season Vaughn accepted a football scholarship from
Kansas State University. He entered his freshman season as one of the Wildcats' top running backs and became the team's starter over Harry Trotter early in the season. He had three games on the season going over 100 rushing yards:
Texas Tech,
Baylor, and
Texas. He recorded a 129-yard receiving game against
Oklahoma. He registered 123 carries for 642 rushing yards, seven rushing touchdowns, 25 receptions for 434 yards, two receiving touchdowns, and seven kickoff returns for 145 yards. He was named the Big 12 Conference Offensive Freshman of the Year and second-team All-Conference.
2021 season Vaughn entered his sophomore season on the watch list for the
Doak Walker Award. He tallied 235 carries for 1,404 yards (6-yard avg.), 18 rushing touchdowns, 49 receptions for 468 yards (9-yard avg.) and four receiving touchdowns. He had nine games on the year going over 100 rushing yards to go with one game going over 100 receiving yards. He posted 162 rushing yards (career-high), 70 receiving yards, and three rushing touchdowns, including an 80-yard touchdown run against
Kansas. He had 146 rushing yards, three rushing touchdowns and one receiving touchdown in the
2022 Texas Bowl 42–20 win against
LSU. He was named as a Consensus All-American.
2022 season As a junior, he recorded 293 carries for 1,558 yards (5.3-yard avg.), nine rushing touchdowns, 42 receptions for 378 yards (9-yard avg.), three receiving touchdowns and 1,936 all-purpose yards. He became the third player in school history with multiple 1,000-yard rushing seasons and the first player with 1,000 rushing yards and 1,000 receiving yards in a career. He had 147 rushing yards and a touchdown in the regular-season finale against the
Kansas. He tallied 130 rushing yards and one touchdown in the
Big 12 Championship Game 31–28 overtime victory against
TCU. He had 133 rushing yards, including an 88-yard touchdown, in the 45–20
2022 Sugar Bowl loss against
Alabama. At the end of the season, he chose to forgo his senior season to enter the
2023 NFL draft. He finished his college career with 651 carries (second in school history), 3,604 rushing yards (second in school history), 5.5-yard average, 34 rushing touchdowns, twenty one 100-yard rushing games (second in school history), 116 receptions for 1,280 yards (11-yard avg.), 9 receiving touchdowns, 7 kickoff returns for 145 yards (20.7-yard avg.), 5,029 all-purpose yards (third in school history), 258 points scored (sixth in school history) and 279 rushing yards in bowl games (school record). He was one of just two Big 12 players to ever register 3,600 rushing yards and 1,250 receiving yards in a career (
DeMarco Murray). He was named a consensus
All-American for the 2022 season.
College statistics ==Professional career==