The Chiefs patchwork offensive line has struggled to protect the QB (18 sacks allowed, tied for worst in the league) and in run blocking. Well, at least if you trust your eyes. Pro Football Focus ranked them higher than expected, which is probably more indicative of poor o-line play across the NFL than it is of improvement for the Chiefs front five.
This could be the first week that they've used the same starting five from the prior week so perhaps they start building that "continuity" thing, which is somewhat important.
The focal point for the o-line criticism has been a moving target: LDT, Fulton, Grubbs, and Stephenson have all had terrible games during the losing streak.