It should not immediately sound off the alarm but Ryan Shazier apparently did not practice today, according to Jacob Klinger of PennLive.com.
#steelers LB Ryan Shazier DNP today, Terence Garvin said. @pasports
— Jacob Klinger (@Jacob_Klinger_) November 23, 2015
Shazier missed a chunk of practice last week with a knee injury though was ultimately able to play Sunday against the Cleveland Browns. He did not play every snap though and was rotated out a little more than usual with Sean Spence and Vince Williams.