After redshirting his first year at Boise State in 2016, Weaver played in all 14 games in 2017, recording 33 tackles, 11 sacks and one interception.
[2][3] During his redshirt junior year in 2019, he set the Mountain West Conference record for career sacks.
[4] After this season, Weaver announced that he would forgo his final year of eligibility and enter the 2020 NFL draft.
[12] Weaver made his NFL debut on January 9, 2022, against the Cincinnati Bengals, logging a tackle in the 21–16 victory.
[19] On October 6, 2023, Weaver signed with the Birmingham Stallions of the United States Football League (USFL).