He's been part of two Redskins' playoff clubs and he played on a team that went 5-11. He's played for Norv Turner, Terry Robiskie, Marty Schottenheimer, Steve Spurrier and Joe Gibbs.
His position coaches have been Russ Grimm, Joe Pendry, Kim Helton and Joe Bugel. Teammates? Everybody from Deion Sanders and Darrell Green to Jeff George, Danny Wuerffel and Patrick Ramsey.
Ever since 1999, when he was selected in the second round (37th overall) out of Michigan, right tackle Jon Jansen has been a constant for the Redskins. The rare exception, of course, was back in 2004 ruptured his Achilles tendon in the Hall of Fame pre-season game in Canton, Ohio, and missed the entire season.
In any event, when Jansen, the eighth-year NFL standout out of Clawson, Mich., lines up against the talented defensive front of the Jacksonville Jaguars, he'll be playing in his 100th NFL contest.
He's a long away from Green's team record of having played in 295 games between 1983 and 2002. Still, to hit the 100-game mark is a key achievement and a key signpost in Jon Jansen's career.
When told of the achievement on Wednesday, Jansen said: "There have been a lot of guys who have made that, obviously, but it's still a good landmark. It's twice as many games as I played in college. I'd like to play as long as I possibly can and I want to make sure my quality of play is up there."
Jansen joins Chris Samuels as pillars on the Redskins' offensive line. They're among the most popular and recognizable members of the team.
In 2005, when the Redskins' offense improved to 11th in the league from 30th the year before, Jansen gave his usual substantial effort, week in and week out. He protected the blind side of lefthander Mark Brunell, a key task.
What's more, Jansen played with soft casts protecting his two broken thumbs for nearly the first half of the season, and a single cast for most of the rest of the year, but still managed to start all 16 games and the two playoff contests.
In wearing the casts, the 6-6, 310-pound Jansen said he wanted to reinforce the notion that he can play despite a high level of discomfort. He added: "I hope I don't have to go through that again, but that's just part of the deal."
Having to battle opponents without the complete use of his hands helped him polish his skills, he believes.
"It was more of a mental challenge than anything because I had to be perfect in my technique," he said. "I had to be perfect in my steps. I didn't have the use of my hands to make up for mistakes with my feet. So I had to be perfect from a footwork standpoint."
If not for sitting out the 2004 season due to an Achilles tendon injury, Jansen hasn't missed a start as a Redskin. He justly carries the nickname "Rock" that stems from his college days at Ann Arbor.
This year, Jansen is excited about playing on a Redskins offense directed by Al Saunders, the new associate head coach-offense who helped guide the Chiefs' offense to the league's No. 1 ranking the past two seasons.
"He was a great addition," Jansen said. "He's really brought a lot of energy to our offense, not only in his schemes and the movements and the way we're doing things, but just as a personality. You can see it on the football field. Guys are finishing plays more."