The offensive line is the most injured that I have seen in my 35 years of watching the Denver Broncos. Billy Turner came back and played every snap, but at one point he was the only starter from game 1 in the game. The offense as a whole has been absolutely gutted by injuries this season.
If you compare the starters from Week 1:
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To the starters from Week 15:
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We find that we had five players in common and one, Quinn Meinerz left both games with an injury early in the first quarter.