McCullers did not record a tackle during Sunday's 16-13 win over Cincinnati.
The big defensive lineman played just four snaps in the season finale and finished the 2018 season with five tackles -- including one sack -- in 15 games. McCullers is an unrestricted free agent who serves as roster depth.
McCullers (ankle) is absent from Wednesday's injury report, Teresa Varley of the Steelers' official site reports.
McCullers sat out Pittsburgh's win over the Panthers in Week 10 due to an ankle injury but appears to have fully recovered. Barring any setbacks, expect the depth nose tackle to play a limited defensive role during Sunday's game against the Jaguars.
McCullers (ankle) has been ruled out for Thursday's matchup against the Panthers, Jeremy Fowler of ESPN.com reports.
McCullers will join Marcus Gilbert (knee) as the only two Steelers not playing in Thursday's contest against the Panthers. The Tennessee product logged a limited practice Monday but was unable to practice Tuesday and Wednesday.
McCullers re-signed to a one-year deal with the Steelers on Thursday, Joe Rutter of Triblive.com reports.
McCullers will remain in Pittsburgh, where he was drafted in the sixth-round of the 2014 draft. The nose tackle has been more of a depth lineman so far in his career, registering just one start in 42 career games. The Steelers now have all six defensive linemen who saw action last season under contract for the 2018 season as well.