Amari Gainer attended Chiles High School in Tallahassee, FL. Out of high school, Gainer was graded as a three-star recruit by ESPN and 247sports and given a four-star rating by Rivals.com. At the time, Gainer was 6’2” and 204 pounds. Over his high school career, he had 240 tackles including 60 TFL and 26 sacks. His best season was his senior year where he notched 93 tackles with 24 TFL, 12 sacks and an interception. After high school, he decided to stay in his hometown and attend Florida State University.
He spent his first 4 years with the Seminoles and had some definite ups and downs throughout his time there. His best seasons were his 2019 and 2021 seasons. In these two years, he played 25 games bringing in 128 tackles with 12.5 TFL, 4.5 sacks, 3 forced fumbles and 2 recoveries.
His career was paused at the beginning of the 2022 season when he sustained a lower leg injury in the first game which kept him out for several weeks. He played 7 games to end the season and had just 17 tackles as he lost playing time due to his lingering injury.
With his injury situation, Gainer decided to return to college for his fifth season but hit the transfer portal to head to UNC. He recovered from his injuries and was 100% healthy going into this season. He started 12 games and collected 24 tackles and 2.5 sacks.