Ryan Fitzpatrick, over this long career, has played because of suspension.

He has played because of injury.

He has even played because IK Enemkpali socked Geno Smith in the jaw over a $600 debt.

So he not only knows the fleeting nature of the NFL, he has benefited from it.

But when the Dolphins inevitably start Josh Rosen at some point this season, he will be on the flip side of that dynamic.

Little can surprise Fitzpatrick at this point. Not getting benched. And not keeping his starting job — at least for this week — despite being the league’s lowest-rated quarterback.

“I’ve seen it every way,” Fitzpatrick said. “I truly have. ... There’s a million things and ways it’s happened in my career. For me, always being ready and knowing that when I have my opportunity, I have to go out there and do my best.

“My whole career has been like that. I try to do my best in putting my focus in what I can control,” Fitzpatrick said. “The first two games, there’s a lot of things that I need to do better in order for us to perform better, and that’s where my focus is on right now.”

But he must know the leash draws shorter with every blowout loss. Dolphins coach Brian Flores seemed to equivocate a bit Wednesday when asked who would start at quarterback Sunday against the Cowboys.