Looks like he might be ok:
Steelers ILB Ryan Shazier has been diagnosed with a spinal contusion and remains without a timetable for return.
The team will know more once the swelling in his spinal cord goes down, but this is believed to be good news compared to what the other diagnoses could have been for Shazier. Former Steelers QB Tommy Maddox suffered a similar injury in the early 2000s and missed just one game. According to reports, Steelers players and personnel are encouraged by Shazier's prognosis.