EAST RUTHERFORD -- The Jets on Saturday placed starting inside linebacker Erin Henderson on the reserve non-football injury/illness list. This works just like normal injured reserve, so Henderson's season is likely over.

The NFI list sometimes applies to players who sustain an injury away from football. But in this situation, Henderson is not injured, according to coach Todd Bowles, who spoke briefly about the situation after Sunday's win over the Ravens.

"Non-disclosed injury," Bowles said. "We'd rather keep that private right now."

When pressed, Bowles said Henderson's situation is a "non-injury." And then Bowles made himself clearer, saying, "It's not an injury."

This is a curious situation, but one the Jets can probably overcome, once inside linebacker Darron Lee, a promising rookie first-round draft pick, returns from an ankle sprain that sidelined him Sunday. Lee does not have a high ankle sprain.

On Sunday, the Jets started Bruce Carter next to middle linebacker David Harris, who returned from a one-game absence (hamstring injury). Lee was Henderson's understudy, so expect Lee to start next to Harris once he's healthy again.

Darryl Slater may be reached at dslater@njadvancemedia.com. Follow him on Twitter @DarrylSlater. Find NJ.com Jets on Facebook.