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Broncos quarterback Trevor Siemian injured his shoulder on a first-quarter sack by Colts linebacker Barkevious Mingo.

Trevor Siemian‘s season is over.

An MRI taken in Colorado on Friday confirmed that Siemian suffered sublaxation, or a partial dislocation, of his left (non-throwing) shoulder - the same one he had surgically repaired - and will be placed on season-ending injured reserve.

Siemian landed on his shoulder during a first-quarter sack by Colts linebacker Barkevious Mingo, and after a quick examination on the bench, Siemian was carted back to the locker room for further testing.