ALLEN PARK -- It won't end up in the box score, but anyone who watched the preseason opener saw it.

There was Marshawn Lynch, busting through the line untouched and then just running away from Lions safety Glover Quin for a 60-yard touchdown. It was a head-scratcher, considering Lynch is a 32-year-old power back who was never known for his speed even in his prime. And Quin has been one of Detroit's best defenders for a half-decade straight. He doesn't make mistakes.

But there he was, losing ground to one of the slower starting backs in the league. Which prompted the question: Has he lost a step?

"I still feel like I can play, I still feel like I can make plays," Quin said before practice Monday. "If I felt like I couldn't do it -- like I told y'all in minicamp, if I felt like I couldn't do it -- I wouldn't. I wouldn't. I mean, if I ever feel like I can't do it, I won't. It's just, it's the way it is, it's the way I am."

Quin is 32 years old. He'll turn 33 in January. So whether it's this year or the one after that, or maybe even the one after that, the cliff is coming. He knows it too. He's a savvy vet. He knows how this works. And he insists he'll walk away when he knows it's time.

But now is not the time.

He said he's actually having a great camp, just like the previous five he's had in Detroit -- camps that produced one of the best and most consistent safeties in the game. He still hasn't missed a start since signing with Detroit in 2013, and has started 132 games in a row overall. That's double any other safety in the game.

"I feel like I've had a good camp," he said. "I haven't done anything catastrophic, I haven't done anything super amazing. But if you guys go back through the history of my five prior camps, they've probably been the same. Nothing real over the top, nothing real under the bottom. Just trying to focus on getting better every day."

As for the Lynch play, well, Quin said it was a matter of taking a bad angle. Those eyes, you know? He sat out conditioning and spring ball to be with his family in Houston, and it has taken some tme to get back those eyes that have made him one of the best safeties of his generation. And he's confident he'll have them back by the Sept. 10 opener.

"I play with my eyes a lot, so it's retraining your eyes to see certain things," he said. "Seeing certain formations and expecting certain things, just getting back into it. It's not that big of a deal."