Allen (hamstring) was listed as a limited participant at practice Wednesday.
Mike Williams (ankle) was also listed as a limited participant Wednesday, which offers hope that the Chargers' top two receivers could return to action Sunday against the Chiefs. Per Lindsey Thiry of ESPN.com Allen -- who last suited up Week 7 -- said that he's taking his situation "just kind of day-by-day" as he works through a lingering left hamstring issue. In two games to date this season, Allen has caught six passes for 77 yards.