He played college football at California and signed with the Carolina Panthers as an undrafted free agent in 2019.

He was forced to redshirt his true freshman season after breaking his wrist while playing his first snap of the year.

[1] The following season he recorded 118 tackles (the most of any California junior college player), three sacks, one forced fumble and three pass breakups and was named first-team All-Big 8 Conference, a Junior College Freshman All-American and the CCCAA NorCal Division Defensive Player of the Year.

[6] In his final season, Kunaszyk made 148 tackles (11 for loss), four sacks and five forced fumbles with three pass breakups and an interception and was named first-team All-Pac-12 Conference and second-team All-America by Sports Illustrated.

[9] He made his NFL debut on September 12, 2019, against the Tampa Bay Buccaneers, playing 15 snaps on special teams.

[19] On January 8, 2022, Kunaszyk was placed on the COVID-19 reserve list and officially ruled out of the last game of 2021 regular season.