Tuioti-Mariner was originally signed by the Falcons following the 2018 NFL Draft out of UCLA. The Corona, Calif., native has appeared in 24 games over two seasons and has tallied 34 total tackles (23 solo), 1.0 sack, two tackles for loss, five quarterback hits, two forced fumbles, two fumble recoveries and 11 special teams tackles. Tuioti-Mariner earned NFC Defensive Player of the Week honors in Week 12 of the 2020 season when he tallied a career-high five total tackles (three solo), 1.0 sack, one forced fumble, two fumble recoveries and one special teams tackle against the Las Vegas Raiders. He finished the 2020 season with 20 total tackles (15 solo), 1.0 sack, four quarterback hits, one forced fumble, two fumble recoveries and a career-high 11 special teams tackles in 16 games.