[5] Throughout training camp, Kirkwood competed for a roster spot as a backup wide receiver against Austin Carr, Tommylee Lewis, Brandon Coleman, Josh Huff, Travin Dural, and Eldridge Massington.
[6] On September 1, 2018, the Saints waived Kirkwood as part of their final roster cuts, but signed him to their practice squad the following day after clearing waivers.
[9] The Saints placed multiple wide receivers on injured reserve after sustaining injuries, including Ted Ginn Jr., Tommylee Lewis, Travin Dural, and Cameron Meredith.
[10] Kirkwood became the fourth wide receiver on the depth chart upon joining the active roster, behind Michael Thomas, Tre'Quan Smith, and Austin Carr.
[14] However, he was not activated by the end of the three-week practice window on December 4, 2019, and remained on injured reserve for the rest of the season.
[15] On April 1, 2020, Kirkwood signed with the Carolina Panthers reuniting him with former Temple head coach Matt Rhule and former college teammates Robby Anderson, P. J. Walker, and Colin Thompson.