He played in 13 games, starting seven, in 2016, recording 15 receptions for 183 yards and two touchdowns. He appeared in 11 games, starting 10, in 2017, catching 20 passes for 320 yards and one touchdown. Mariner played in 12 games, starting five, in 2018, totaling 17 receptions for 209 yards and one touchdown.[2]
Utah State
Mariner transferred to play at Utah State in 2019. He started 13 games in 2019, catching 63 passes for 987 yards and 10 touchdowns, earning second team all-Mountain West Conference honors.[1]
Mariner was signed by the Baltimore Ravens of the NFL on August 9, 2021. He was released on August 30, 2021.[4]
Ottawa Redblacks
Mariner signed with the Ottawa Redblacks of the Canadian Football League (CFL) on January 21, 2022. He was moved to the practice roster on June 5 and promoted to the active roster on October 13, 2022.[4] He played in three games, all starts, for the Redblacks in 2022, catching eight passes for 98 yards and one touchdown.[5][6] Mariner began the 2023 season on injured reserve but was upgraded to the active roster after the Redblacks cut Quan Bray on June 29, 2023.[7] He moved between the active roster and single game injury list (healthy scratch) several times during the 2023 season.[4][8] He dressed in 13 games, starting nine, in 2023, recording 18 receptions for 219 yards and one touchdown.[5][6] He became a free agent after the season.[9]