FLORHAM PARK, N.J. — An MRI revealed Jets cornerback Darrelle Revis suffered a mild strain in his left hamstring during Sunday’s 27-17 loss to the Seahawks.

And as of now, it’s unclear if the injury will sideline him for this week’s game in Pittsburgh, where he went to college. “He’s a little sore, but he’s starting to feel a bit better. He hasn’t run, so we’ll see [tomorrow],” coach Todd Bowles said yesterday, adding that it’s “too early to tell right now” if Revis will play.

Backup cornerback Darryl Roberts is an option, as are practice-squadders Dexter McDougle and Bryson Keeton are also on the practice-squad. Said Bowles: “If we need to we’ll do something there.”

Secondary shake-up?

Personnel changes could be coming if the unit keeps underperforming. “We’ll look at it and evaluate day by day,” Bowles said. “It’s a different guy every time. Things will be shaken up as we go forward.”

The Jets (1-3) are 26th in pass defense (285 yards a game), allowing seven passes of 40 yards or more. Each week, players in the secondary have blamed “miscommunication” for their glaring breakdowns. Bowles acknowledged that the struggles of his secondary are “alarming.” But he said “communication” isn’t to blame. “I think it’s issues where some guys aren’t as vocal when they need to be,” he said. “Those are things that can easily be cleaned up and they see it on film . . . It’s not communication, it’s one guy here or there that’s not doing what they’re supposed to be doing. ”

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Asked if things need to be “simplified” for the secondary, the coach matter-of-factly said: “They’re about as simple as they can be.”

The Jets spent roughly $150 million last year to upgrade their secondary with high-priced pieces. But despite the unit’s struggles, Bowles believes he has the necessary personnel to have the secondary he wants. “Yes, I do,” he said.