prior to his junior season, he verbally committed to the university of michigan where he would play for michigan wolverines football as a freshman for the 2015 team via twitter. at the time, he still attended east lake high school, where he was about to play his junior year for the 2013 football team. at the time of his july 27, 2013 verbal commitment, he was ranked as the number one athlete and number three player in the class of 2015 by espn. when scout.com released its first list of 5-star rated football players on august 12, 2013, campbell was included among the 20 players listed and the only wide receiver included. at the end of that summer prior to his junior year football season, he was one of two juniors selected to the 2013 "usa today" preseason all-usa team. he accepted an invitation to participate in the 2015 under armour all-america game in st. petersburg before the end of october 2013. the november 15 fhsaa class 7a region quarterfinal that east lake won 13–12 ended with an alleged punch by a palmetto high school coach that left campbell with a cut inside his mouth. other players were involved in the altercation, which is being investigated by the fhsaa. on november 19, 2013, espn moved campbell up to the number two overall position in the class of 2015. this moved him ahead of kevin toliver ii, but he remained behind jashon cornell. in campbell's third time in the fhsaa, east lake finally got past the regional finals (defeating port charlotte high school), only to lose the following week on december 6, 2013, in the state semifinals in overtime to dwyer high school 31–24, despite a 65-yard touchdown reception by campbell. following the season, campbell decommitted from michigan on december 13.