On the last day of practice before a break over the weekend leading into the first week of the regular season, OG Isaac Seumalo suffered a pectoral injury, per Adam Schefter on X.
Per Schefter’s report, Seumalo had to leave practice due to the injury and is now undergoing tests to determine how severe the injury is. If he misses any time, second-year OG Spencer Anderson or rookie OG Mason McCormick would likely be playing in his spot at left guard. Seumalo was the Steelers’ best and most consistent offensive linemen last season, so this would be a significant blow to the offensive line and the offense as a whole.