Keenan Allen of the Los Angeles Chargers did not participate in Friday's practice due to a heel injury. This is his third consecutive week without any on-field work. The Chargers will make a decision on his availability for Sunday's game at Denver based on their final Week 17 injury report. If Allen is unable to play and Josh Palmer is also sidelined with a concussion, the Chargers will have Quentin Johnston, Alex Erickson, Jalen Guyton, and Derius Davis as their top options at wide receiver.