PITTSBURGH -- Steelers outside linebacker Jarvis Jones has been diagnosed with a concussion, putting his availability for Sunday in question.

According to a team spokesman, doctors tested Jones Monday after he alerted them of lingering headaches and treated him for a possible concussion.

Jones did not practice Wednesday and his appearance on the injury report came as a bit of a surprise since coach Mike Tomlin did not include the Steelers’ first-round pick in the injury update he provided Tuesday at his weekly news conference.

I’ll have an update on Jones following Thursday’s practice.

Jones has started the past four games at right outside linebacker, and his pressure on Jets quarterback Geno Smith in the fourth quarter last Sunday resulted in a Lawrence Timmons interception that sealed the Steelers’ 19-6 win.

If Jones is unable to play, Jason Worilds will start at right outside linebacker.

Worilds is coming off his best game of the season as he recorded his first sacks of the season and was third on the Steelers in tackles as they kept the Jets out of the end zone.

Jones, who replaced Worilds in the starting lineup after the first game, has 14 tackles and three quarterback pressures. The former Georgia star is also tied for the team lead with four special-teams tackles.