Injuries have slowed him down a little bit this season, but he remains a guy who can change a game anytime he steps on the field.
And don't think for a second the Dolphins aren't aware of him.
"We're dealing with a great football player and probably a Hall of Fame football player," said Coach Dave Wannstedt. "At times he can be a little unpredictable. And by that I mean you don't know when he's blitzing and when he's not blitzing. It's tough to keep track of him and it's tough to account for him.
"He's an excellent football player and he brings the emotion that you are looking for from a defensive standpoint. He's the full package."
As Wannstedt mentioned, it's difficult to know what Seau will do on any given play.
It's often been suggested through the years, in fact, that Seau does a lot of freelancing, meaning he blitzes on his own rather than adhering to the defensive call.
Either way, what he has done has been successful because of his incredible intensity, whether the Chargers have a good team or whether they struggle, as they did the last couple of years.
As a wide receiver, Chris Chambers won't be going head-to-head against Seau very often, but he does expect to run into Seau should he catch some short passes.
"Yeah, unfortunately," Chambers said. "He's a great student of the game. He knows exactly where to go and where to be. I'm sure if he sees me coming across the middle shallow, he'll let me know."