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Steelers Rookie Derrick Harmon Diagnosed With Knee Sprain After Being Carted Off

The first-round defensive lineman is undergoing further evaluation, leaving his Week 1 availability unresolved.

Aug 9, 2025; Jacksonville, Florida, USA; Pittsburgh Steelers defensive tackle Derrick Harmon (99) rushes the passer against the Jacksonville Jaguars during a preseason game at EverBank Stadium. Mandatory Credit: Travis Register-Imagn Images/File Photo
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Overview

  • He suffered the injury in the second quarter of the preseason finale at Carolina and was ruled out, the team’s communications director confirmed.
  • Missi Matthews reported Harmon later returned to the sideline in street clothes and walked to the bench on his own, an encouraging sign noted by multiple outlets.
  • Mike Tomlin said postgame that Harmon has "a knee sprain of some description" and is being evaluated, with no timetable provided.
  • An MRI is planned, and the Pittsburgh Post-Gazette’s Gerry Dulac reported Harmon is expected to miss a few weeks and has avoided season-ending damage.
  • Harmon, the No. 21 pick expected to contend for a starting role, could force depth adjustments on the defensive line if he misses time.