As a freshman, Monday totaled 13 tackles, two sacks, and one interception. Monday's first career start was against Ole Miss, where he was almost ejected for targeting.[3] In his sophomore season, Monday recorded 20 tackles, one sack, and one interception that was returned for a touchdown in the 2019 Iron Bowl.[4] Monday played in all 11 of Auburn's games in 2020 and recorded 64 tackles, one sack, one forced-fumble, and two interceptions. He had a 100-yard interception return for a touchdown in a 30–17 victory over Tennessee.[5] He was named to the Second-team All-Southeastern Conference (SEC).[6] In Monday's senior season, he tallied 58 tackles, two sacks, and one interception. The interception was a pick six tying Monday for the Auburn record for most interceptions returned for a touchdown in Auburn history with three.[7] At the regular season's end, Monday announced he would declare for the 2022 NFL draft following the Tiger's bowl game.[8] In his final collegiate game, Monday recorded five tackles before being ejected for targeting.[9]
Monday signed with the New Orleans Saints as an undrafted free agent on April 30, 2022.[12] On August 2, Monday suffered a torn ACL during practice, which prematurely ended his season.[13] He was placed on injured reserve on August 5.[14]
On August 28, 2023, Monday was released by New Orleans.[15]