Deculus was born in Mamou, Louisiana, but grew up in Cypress, Texas, where he attended Cy-Fair High School.

[2] In the second week of his sophomore season in 2018, Deculus had his first start at left tackle in a game against Southeastern Louisiana.

[2] Deculus was considered the "most improved" offensive lineman at LSU in 2019 and started 13 games, missing two due to injury.

[2] Deculus started all ten games at right tackle in 2020, and was named to the 2020 Southeastern Conference Academic Honor Roll.

[2] Deculus was selected in the sixth round of the 2022 NFL draft by the Houston Texans with the 205th pick overall.