Rex Ryan was joking when he said the Jets might run the Wishbone Monday night in Atlanta against the Falcons with his team’s options at wide receiver so thin. The state of Gang Green’s receiving corps is no laughing matter however.

In fact it’s scary.

The Jets could be without two of their top three receivers a season-long issue a year ago that limited the passing attack and the group hasn’t exactly been striking fear into opposing secondaries in the first place this season.

Neither Santonio Holmes (hamstring) nor Stephen Hill (concussion) were present during the portion of practice the media was allowed to attend on Wednesday. A source told The Post Holmes will be out against the Falcons and Hill is unlikely to play as well though Ryan said “it’s up in the air right now.”

The injuries are reminiscent of last year’s struggles through the air when Holmes missed all but four games with a Lisfranc foot injury and a sprained right knee cost Hill five games. Hill the Jets’ lone deep threat and Holmes have combined for 23 of the unit’s 39 receptions 476 of its 702 yards and its only two touchdowns.

“Boy I hope not. I hope it’s not that way” Ryan said referring to last season’s troubles at wide receiver. “But certainly I’d say it’s a concern when your top guys [are] out.”

If neither can go the Jets may have to sign another receiver — Tuesday they inked former Bills wideout David Nelson — or activate Michael Campbell from the practice squad otherwise they will enter the Atlanta game with just four wideouts.

That will leave turnover-prone rookie quarterback Geno Smith with one legitimate option out wide in third-year pro Jeremy Kerley. With Hill knocked out early and Holmes clearly limited against the Titans on Sunday Smith struggled mightily while throwing two interceptions.

Smith expressed optimism in the team’s healthy receivers and said it could open up more chances for tight ends Kellen Winslow Jr. and Jeff Cumberland.

“We still have guys who can step up and make plays” Smith said. “Whoever is in there will be expected to carry their load.”