Blackmon played at Utah from 2016 to 2019. He played his first three years as a cornerback before switching to safety for his senior season.[4][5] As a sophomore in 2017, he was named the MVP of the 2017 Heart of Dallas Bowl.[6] As a senior in 2019, he was named a first-team All-American by Sports Illustrated and The Athletic. He finished his career starting 39 of 48 games, recording 158 tackles, nine interceptions, 1.5 sacks and two touchdowns.
In Week 4 against the Chicago Bears, Blackmon recorded his first career interception off a pass thrown by Nick Foles during the 19–11 win.[11] In Week 6 against the Cincinnati Bengals, Blackmon intercepted a pass thrown by fellow rookie Joe Burrow late in the fourth quarter to secure a 31–27 Colts' win.[12] In Week 11 against the Green Bay Packers, Blackmon forced a fumble on Packers' wide receiver Marquez Valdes-Scantling which was recovered by teammate DeForest Buckner early in overtime to help the Colts win the game 34–31 by a game winning field goal.[13]
During practice for Week 7 of the 2021 season, Blackmon tore his Achilles and was placed on injured reserve on October 23, 2021, ending his season.[14]
Blackmon returned as a full-time starter in 2023, recording a career-high 88 tackles and a team-high eight passes defensed.
On April 2, 2024, the Colts re-signed Blackmon to a one-year, $7.7 million contract.[15]
Personal life
In February 2024, Blackmon announced his engagement to his girlfriend Tyra Gilmore.[16] They got married on July 12, 2024.[17]
