In Mark Sanchez’s mind, he expects to be the starting quarterback on Sept. 8 at MetLife Stadium when the Jets open the season against the Buccaneers.

“No doubt,” Sanchez said when asked if he expects to win the job. “Sure, of course.”

But no one else around the Jets sounds as confident as him. The mantra from Jets’ brass is this will be an open competition for the starting quarterback job between Sanchez, rookie Geno Smith and David Garrard. They are even throwing in Greg McElroy and Matt Simms as part of it.

Sanchez seemed unfazed by the team selecting Smith in the second round of last week’s NFL Draft. He said offensive coordinator Marty Mornhinweg called him after the pick and said the Jets were “heating up the competition” and “go win the job.”

“There’s a little fire going and that’s good,” Sanchez said. “I’m cool with that. I think it’s good for everybody.”

The fifth-year quarterback has never faced a challenge like this as a Jet. He had a contrived competition with Kellen Clemens as a rookie and then Tim Tebow got here last year, but the team never gave Tebow a shot at the starting job.

“It’s an exciting time,” Sanchez said. “I’m thrilled to compete. It will bring out the very best that I have and that will help the team.”

Center Nick Mangold said you can see a difference in Sanchez already.

“I can’t put my finger on it, but there is something different,” Mangold said. “He’s got like a maturity level difference. There’s something with the way he’s going about his work and the way he’s taken to Marty’s system. I’m hoping for big things because that will help all of us.”

Sanchez is coming off consecutive seasons with 26 turnovers, which led to him losing his grip on the starting job. He said other than Mornhinweg, he did not hear from anyone with the Jets about what Smith’s selection meant for him.