Lemonier signed with the
Los Angeles Chargers as an
undrafted free agent following the
2020 NFL Draft on April 26, 2020.[1] He was waived during final roster cuts on September 5, 2020,[2] and signed to the team's
practice squad the next day.[3] He was promoted to the active roster on September 26, 2020,[4] waived on October 24, 2020,[5] and re-signed to the practice squad four days later.[6] He was promoted back to the active roster on November 7,[7] waived on November 28, 2020,[8] and re-signed to the practice squad four days later.[9] He was elevated to the active roster on December 17 for the team's week 15 game against the
Las Vegas Raiders, and reverted back to the practice squad after the game.[10] He was signed to the active roster on December 26, 2020.[11]
On August 31, 2021, Lemonier was waived by the Chargers.[12]
Detroit Lions
On September 2, 2021, Lemonier was signed to the
Detroit Lions practice squad,[13] promoted to the active roster on October 6,[14] and waived on May 16, 2022.[15]
Arizona Cardinals
On May 17, 2022, Lemonier was claimed off waivers by the
Arizona Cardinals[16] and released on August 17.[17]
On January 26, 2023, Lemonier died at the age of 25. Lemonier and his girlfriend were expecting their first child at the time of his death. His cause of death is unknown at this time.[21]