One of the NFL’s worst illegal-hit offenders has been suspended for a separate infraction.

Bengals linebacker Vontaze Burfict is set to serve a four-game ban to start the 2018 season for violating the league’s performance-enhancing drug policy, ESPN reported Friday. The ruling is pending an appeal, for which a date has not yet been set.

Burfict has been fined and suspended repeatedly throughout his six-year career for endangering players with illegal and vicious hits. Several opponents, including Panthers tight end Greg Olsen and Steelers quarterback Ben Roethlisberger, have accused him in the past of intentionally trying to hurt them by targeting specific areas of their bodies. Burfict was fined $25,000 in 2014 for twisting the ankles of Olsen and Cam Newton and nearly $70,000 for a number of unnecessary roughness plays in a 2015 game against the Steelers.

The NFL began taking Burfict’s foul play more seriously, suspending him for the first three games of the 2016 season for an illegal hit to the head against Antonio Brown in an AFC wild-card game the year before. Facing a five-game suspension to start last season, after officials ruled he hit Chiefs fullback Anthony Sherman in a defenseless position in a preseason game, Burfict appealed the ruling and got it reduced to three games.

Despite the extensive history of penalties, Burfict signed a three-year contract extension with the Bengals in September worth roughly $38 million.

Burfict, 27, has been a productive player when he’s on the field, recording 73 solo tackles and two sacks in just 11 games last season. The problem is the undrafted defender hasn’t played a full 16-game season since 2013, his second season in Cincinnati.