Miami Dolphins (first stint) Armstrong was selected by the
Miami Dolphins in the sixth round (209th overall) of the
2018 NFL draft. He was released during final roster cuts on August 31, 2019.
Houston Texans On September 1, 2019, Armstrong signed a two-year contract with the
Houston Texans. On September 10, he was waived and re-signed to the
practice squad. He was promoted to the active roster on October 26. Armstrong signed a contract extension with the Texans on March 1, 2021. He was
waived/injured on August 30 and placed on
injured reserve. Armstrong was released on September 7.
Atlanta Falcons On December 7, 2021, Armstrong was signed to the
Atlanta Falcons' practice squad. He signed a reserve/future contract with the Falcons on January 10, 2022. He was placed on injured reserve on August 16. On August 24, Armstrong was released by the Falcons and re-signed to the practice squad on October 3. He was promoted to the active roster on October 29. On March 20, 2023, Armstrong re-signed with the Falcons on a one-year deal. He was placed on injured reserve on August 29 and released on September 8.
Las Vegas Raiders On October 10, 2023, Armstrong was signed to the
Las Vegas Raiders' practice squad. He signed a reserve/future contract on January 8, 2024. On August 27, Armstrong was waived by the Raiders as part of final roster cuts.
Miami Dolphins (second stint) On July 24, 2025, Armstrong signed with the Miami Dolphins. On August 26, he was released as part of final roster cuts and signed to the practice squad the following day. On September 13, Armstrong was signed to the active roster. On October 10, he was released from injured reserve with an injury settlement. == Personal life ==