Update: Initial tests show that Isaac Seumalo's injury is not season-ending.

The Pittsburgh Steelers' starting offensive guard, Isaac Seumalo, went down with what could be a season-ending injury at practice on Wednesday.

According to ESPN's Adam Schefter, Seumalo suffered a pectoral injury. Tests will be performed to determine severity. T.J. Watt experienced a torn pectoral in 2022, which sidelined him for seven games.

According to CBS News/KDKA, a full tear of the pectoral muscle will take four to six months to heal and would require surgery to repair the damage, in addition to eight to 12 weeks or rehab. A partial tear only needs some rest to heal and can take four to six weeks.

Depending on the severity, the Steelers could seek a veteran free agent to fill the Seumalo void. Otherwise, it'll be a next-man-up situation for the Steelers to start the season with rookie Mason McCormick or last year's 2023 seventh-rounder Spencer Anderson.

The Steelers signed the ex-Philadelphia Eagles offensive lineman to a three-year contract in 2023 free agency. He allowed zero sacks in his first season in Pittsburgh.

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This article originally appeared on Steelers Wire: Steelers starting OG suffers potential season-ending injury