Even last season, when he served a three-game suspension, lost his job as the featured back and didn't eclipse 1,000 rushing yards for the first time, was gratifying in its way.
That's why Lynch claimed he has nothing to prove in 2010.
"I know what I can do," Lynch told me after Saturday's practice at St. John Fisher College. "People already have seen what I can do.
"Last year was a little different situation that I was dealing with. The only thing I've got to prove is to myself, and I did that -- trouble-free for a whole year."
He delivered that last line with a self-effacing laugh.
Lynch has demonstrated workhorse capabilities, but he must show new head coach Chan Gailey he can be a reliable force. Lynch fell out of favor with interim Bills coach Perry Fewell and didn't start from Week 12 on. Lynch, a year after going to the Pro Bowl, finished with 450 yards and two touchdowns.
I asked Lynch what he thought of Gailey's history of designating one running back to handle the carries and the playing time plummeting for the second back.
"I'm just here to play my part," Lynch said. "I don't know what the workload's going to be. It's going to be what it's going to be. And wherever I fit in, that's where I'm going to fit in."
As for the team's chances this year, Lynch maintains a mildly ambitious outlook.
"You say best-case scenario? Realistically?" Lynch said. "Well, I like to win, and I'm sure these guys do, too. I ain't going to sell myself short. I at least would like to see us with a winning season."