2021 Koonce was selected in the third round with the 79th overall pick of the
2021 NFL draft by the
Las Vegas Raiders. The Raiders had received the 79th pick used to select Koonce in a trade that sent
Rodney Hudson to the
Arizona Cardinals. On July 23, 2021, Koonce signed his four-year rookie contract with Las Vegas. Koonce was activated for Week 2 against the
Pittsburgh Steelers but did not appear in the game. He was next activated before Week 13 following an injury to linebacker
Carl Nassib. Koonce made his NFL debut on December 5 and, despite taking the field for only seven plays on defense and four on special teams, recorded a sack of
Washington quarterback Taylor Heinicke.
2023 Koonce had a break out year in 2023, playing opposite
Maxx Crosby on the Raiders defensive line. By Week 14 against
Minnesota Vikings, Koonce had roughly doubled his playing time under interim head coach
Antonio Pierce. Koonce had more quarterback hits in Weeks 14-16 than he had the rest of the season combined. Koonce had his best statistical game as a pro in a Christmas Day matchup against their division rival
Kansas City Chiefs. The Raiders needed a win to keep their playoff hopes alive. Koonce harassed Chiefs quarterback
Patrick Mahomes all game, finishing with career highs in pressures (8) and sacks (3).
2024 Koonce was placed on injured reserve on September 7, 2024 after suffering a knee injury in practice. On September 20, it was announced that the injury would end Koonce's season.
2025 On March 11, 2025, Koonce signed a one-year, $12 million contract extension with the Raiders. He played in all 17 games with three starts, recording 30 tackles, 4.5 sacks, and a forced fumble.
2026 On March 11, 2026, Koonce signed a one-year, $11 million contract extension with the Raiders. ==NFL career statistics==