A 3-star linebacker recruit, Bentley committed to play college football at Purdue over offers from Iowa, Marshall, Maryland, Massachusetts, Pittsburgh, Rutgers, Syracuse, Virginia, and West Virginia.[3] Bentley was a four-year starting linebacker and a three-time team captain at Purdue. As a senior in 2017, Bentley played in 12 games, starting 11, and recorded 97 tackles, one sack, two forced fumbles, three pass breakups, and one interception, which he returned for a touchdown.[4] Bentley was named as an honorable mention All-Big Ten linebacker for his efforts in the 2017 season.[5][6]
In 38 career games at Purdue from 2014-2017, Bentley recorded 272 tackles, one sack, two interceptions, seven pass deflections, two forced fumbles, three fumble recoveries, and one defensive touchdown.[7] He was the defensive MVP of the 2017 Foster Farms Bowl.[8]
The New England Patriots selected Bentley in the fifth round (143rd overall) of the 2018 NFL draft. The Patriots acquired the pick in a trade that sent their third round pick (95th overall) to the San Francisco 49ers for a fifth round pick (143rd overall) and offensive tackle Trent Brown.[11] Bentley was the 18th linebacker drafted in 2018.
2018
On May 12, 2018, the New England Patriots signed Bentley to a four-year, $2.76 million contract that includes a signing bonus of $303,954.[12]
Throughout training camp, Bentley competed against veteran Elandon Roberts to earn the job as the starting outside linebacker.[13] On August 16, 2018, Bentley recovered a fumble forced by Adrian Clayborn and returned it 54-yards for the touchdown in the Patriots' 37-20 victory against the Philadelphia Eagles..[14] Head coach Bill Belichick named Bentley a backup outside linebacker behind Elandon Roberts to begin the regular season.[15]
On September 9, 2018, Bentley made his professional regular season debut and earned his first career start alongside Dont'a Hightower and Kyle Van Noy, recording seven combined tackles (four solo) and one tackle for-a-loss as the Patriots defeated the Houston Texans 27–20. In Week 3, Bentley recorded five combined tackles (three solo), a pass deflection, and made his first career interception on a pass from Matthew Stafford that was intended for Luke Willson in a 26–10 loss at the Detroit Lions.[16] On September 26, 2018, the New England Patriots officially placed Bentley on injured-reserve, due to a torn bicep he suffered in the fourth quarter against the Lions.[17][18][19] Bentley ended his rookie season with 14 combined tackles (nine solo), one pass deflection, one tackle for-a-loss, and an interception in three games and two starts.[20]
Bentley returned in time for training camp in 2019 and competed to be a starting outside linebacker against Jamie Collins and Elandon Roberts. Head coach Bill Belichick named Bentley the primary backup linebacker behind starters Dont'a Hightower, Kyle Van Noy, and Jamie Collins.[22]
On December 15, 2019, Bentley recorded a season-high nine combined tackles (four solo) during a 34-13 victory at the Cincinnati Bengals. He completed his sophomore season with 43 combined tackles (29 solo), two tackles for-a-loss, and one pass deflection in 16 games and two starts. The Patriots finished the 2019 NFL season atop the AFC East with a 12-4 record, but lost to the Tennessee Titans in the AFC Wildcard Game.
2020
Bentley entered training camp slated as a starting linebacker and was required to lead the linebacking corps after the Patriots lost their top four linebackers from the previous season. Dont'a Hightower opted out of the season due to COVID-19 pandemic while Kyle Van Noy, Jamie Collins, and Elandon Roberts left via free agency. He was named the starting middle linebacker alongside outside linebackers John Simon and Brandon Copeland.
On October 18, 2020, Bentley made 12 combined tackles (eight solo), a season-high two tackles for-a-loss, and was credited with half a sack on Drew Lock marking the first of his career as the Patriots lost 12–18 against the Denver Broncos.
In Week 8, against the Buffalo Bills, Bentley recorded his first full sack of his career on Josh Allen during the 24–21 loss.[23]
2021
Prior to the start of the 2021 season, Bentley changed his jersey number from 51 to 8 becoming the first Patriots player to use a new number with the new relaxed jersey number rule.
2022
On March 18, 2022, the New England Patriots signed Bentley to a two-year, $6.00 million contract extension that includes $3.90 million guaranteed upon signing and a signing bonus of $1.60 million.[24] He started all 17 games in 2022, recording a career-high and team-leading 125 tackles, along with three sacks, two passes defensed, and an interception.
2023
On June 29, 2023, the New England Patriots signed Bentley to a two-year, $13.50 million contract extension that includes $9.00 guaranteed upon signing and a signing bonus of $5.50 million. Bentley is signed to remain with the Patriots throughout the 2025 NFL season.[12]
2024
Bentley played the first two games for the Patriots in 2024, recording 12 combined tackles. In the team's Week 2 game against the Seattle Seahawks, he suffered a torn pectoral muscle and was ruled out for the remainder of the season.[25]