Warner broke his hand three days into fall practice in 2017 and
redshirted for his
freshman season. Warner missed the first four games of 2019 due to an injury, and made a total of seven appearances in the season, starting five games while tallying eight receptions for 101 yards. In 2020, he played in every game, starting four as
captain but only making five catches for 40 yards. Warner transferred to play for the
Kansas State Wildcats in 2021. In his first season with them, he made 13 appearances and totaled 14 receptions for 166 yards. Warner was team captain for his final year, 2022, and posted a career-high 46 receptions for 456 yards with five touchdowns. ==Professional career==