The Kansas City Chiefs ’ offensive line concerns took another worrying turn Thursday. The team downgraded Pro Bowl guard Trey Smith to limited participation after practicing fully the day before. Smith suffered an ankle injury in the Week 12 win over the Colts. This regression in his status raises real questions about his availability for Sunday’s pivotal AFC West showdown against the Los Angeles Chargers.

The Chiefs currently sit at 6-7. They are clinging to postseason relevance. Any uncertainty up front is magnified with Patrick Mahomes needing protection against one of the league’s more physical defensive fronts.

Kansas City has had to endure instability in the trenches this season. Through 14 weeks, the Chiefs have already cycled through 17 different offensive line combinations

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