New England Patriots
In the 2020 NFL draft, Jennings was drafted by the New England Patriots in the third round with the 87th overall pick.[15] He made his NFL debut in the season opener on September 13, 2020, against the Miami Dolphins, playing nine snaps on defense in a 21–11 win.[16] Jennings made his first career start on October 18, recording three tackles in an 18–12 loss to the Denver Broncos.[17] He had 20 total tackles (ten solo) as a rookie in 14 games.[18]
On August 31, 2021, Jennings was placed on injured reserve, ending his season.[19]
Jennings entered the 2022 season as a backup linebacker. He played in 16 games with three starts, recording 27 tackles, 1.5 sacks, two passes defensed, and a forced fumble.[20] In the 2023 season, he had 1.5 sacks, 66 total tackles (49 solo), and one fumble recovery.[21]
On March 15, 2024, Jennings signed a three-year, $12 million contract extension with the Patriots.[22] He finished the 2024 season with 2.5 sacks, 78 total tackles (43 solo), and one pass defended.[23] He finished the 2025 season with two sacks, 26 tackles (15 solo), and one fumble recovery.[24] Jennings had a sack in both the Wild Card Round and the Divisional Round victories over the Los Angeles Chargers and Houston Texans.[25][26] He had six total tackles in Super Bowl LX, a 29–13 loss to the Seattle Seahawks.[27]
On March 11, 2026, Jennings was released by the Patriots.[28]
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