But as Kerrigan enters his 10th training camp with the only franchise he's ever known, the 32-year-old is having plenty of fun being the elder voice of a very young, yet talented defensive front.
NBC Sports Washington captured Kerrigan Mic'd Up during a recent training camp session, and during just that one session, Kerrigan wasn't shy about cracking jokes.
At the beginning of the clip, Kerrigan joked with defensive lineman Matt Ioannidis and rookie Chase Young that it "wasn't his choice" to get Mic'd Up. Ioannidis responded by saying if Kerrigan wanted, he'd unintentionally unplug the mic during one of the drills.
Later, Young was dancing to a song by rapper Kodak Black during stretches, and the rookie asked Kerrigan to join in, saying "They got to get that joint for the mic." Kerrigan, trying to hide a smile as best he could, shook his head no.
While Kerrigan is having fun during his 10th camp with the team, he's also served as a teacher to some of the other linemen on the team.
During one segment, Kerrigan was captured speaking to a bunch of the defensive lineman, explaining when to use certain hand techniques to get by the offensive tackle, based on that player's positioning.
Kerrigan may be the oldest pass rusher on the team, but he certainly still has plenty left in the tank. In fact, how productive Kerrigan has been in the NFL since he was drafted is not appreciated is much as it should be.
Since entering the NFL, Kerrigan's 90 sacks are the fourth most over that span, with only J.J. Watt, Chandler Jones and Von Miller totaling more. Kerrigan remains just two sacks away from breaking Washington's franchise record.
In 2020, Kerrigan will play alongside arguably the most talented defensive front he's played with in the NFL. So although he's now the veteran voice of the group, don't be shocked if he's still plenty productive this fall.