AP

Former Jets coach Rex Ryan soon will be talking to the Bills about their unexpected coaching vacancy. While it’s unclear whether the Bills would want Ryan, the Bills realize Ryan may not want them.

Per a league source, the Bills are concerned that Ryan won’t be interested in taking on a team with an unsettled (and not easily fixed) quarterback situation.

In New York, Ryan thought he had a franchise quarterback in Mark Sanchez, but the fifth overall pick in 2009 never developed. Then came Geno Smith, a 2013 second-round pick whose erratic play eventually sealed Ryan’s fate.

In Buffalo, EJ Manuel has become the starter by default, based on the retirement of Kyle Orton. And with the first-round pick already surrendered to Cleveland in connection with last year’s Sammy Watkins trade, the Bills won’t have many clear options for fixing the quarterback position. (They could sign Sanchez, who’ll be a free agent. Quit laughing.)

Sure, G.M. Doug Whaley has been talking up Manuel during coaching interviews, blaming his struggles not on the player but on coaching. It’s predictable, given that Whaley needs to persuade someone to take the job on which Doug Marrone walked out.

It would be a surprise if Ryan walks in. The thinking in some league circles is that Ryan’s first choice has become the Falcons, and that his Plan B entails working at Bristol, for ESPN.