It isn’t easy for anything or anyone in New York to fly under the radar. But one candidate for the Jets’ vacant head-coaching job has.

Very quietly, the Jets have reached out to Brian Billick and thrown him into the mix of their head-coaching search. They are planning to interview Billick this week, and one league source said the former Ravens coach is “a viable candidate for the Jets’ job.”

Apparently, the Jets aren’t the only ones to contact Billick. The Detroit Lions, according to another source, also have.

Reaching out to Billick makes sense on a number of levels. Rarely are coaches with Super Bowl wins on their resume available for hire. Also, Baltimore still owes Billick two more years of salary to the tune of about $5 million per season, putting the coach on sale for any team that hires him.

And lastl,y there’s this stat: Nine of the past 11 Super Bowls were won by coaches who had been fired from their previous job. Billick falls into that category, along with many coaches now receiving interviews. He also falls into the Jets’ sphere of interest.

Some league insiders believe Jets offensive coordinator Brian Schottenheimer is the favorite for the job, but Billick can’t be dismissed.