Holcomb walked on to the team as a freshman and appeared in all 14 games, mainly on special teams. His playing time grew as he continued to improve and eventually earned a scholarship, playing in 35 games over the next three seasons as he became the starting middle linebacker. In his senior season at Carolina, he appeared in all 11 games (the Tar Heels' game against UCF was canceled due to Hurricane Florence). He earned second-team All-Atlantic Coast Conference Honors for his play as a senior.[1]
Holcomb was selected by the Washington Redskins in the fifth round (173rd overall) of the 2019 NFL draft.[4] On May 9, 2019, the Washington Redskins signed Holcomb to a four-year, $2.75 million contract that includes a signing bonus of $234,884.
In Week 7 against the Dallas Cowboys, Holcomb recorded a sack on Andy Dalton and later intercepted a pass thrown by Dalton during the 25–3 win.[7]
In Week 16 against the Carolina Panthers, Holcomb led the team with 11 tackles and sacked Teddy Bridgewater once during the 20–13 loss.[8]
2021
Holcomb recorded an interception on Jameis Winston in Week 5 of the 2021 season against the New Orleans Saints.[9] In Week 14, he recorded eight tackles and intercepted Dak Prescott and returned it 31 yards for his first career touchdown in a 27–20 loss to the Cowboys.[10] He was placed on the COVID-19 reserve list on December 22, 2021, and forced to sit out of the Week 16 game against the Cowboys.[11] On December 27, he was placed back on the active roster.[12]
2022
Holcomb entered the 2022 season as the Commanders' starting middle linebacker.[13] He missed four games with a knee injury before being placed on injured reserve on November 25, 2022.[14] On December 5, 2022, Holcomb underwent foot surgery, ending his season.[15] He finished the 2022 season with 60 tackles and one pass deflection over seven games.
Pittsburgh Steelers
On March 16, 2023, the Pittsburgh Steelers signed Holcomb to a three-year, $18 million contract that includes a signing bonus of $4.92 million.[16][17] In Week 9, Holcomb's first season with the Steelers ended after a serious knee injury.[18] He finished the season with 54 total tackles, four for a loss, two quarterback hits, two forced fumbles, and two passes defensed.[19]
Holcomb began the 2024 season on the reserve/PUP list while recovering from the knee injury.[20]