Allen (back) was a limited participant in Wednesday's practice.
Allen left in the first quarter of the Chargers' Week 5 loss to the Saints due to back spasms, and the injury is apparently still bothering him to some degree two weeks later. That said, the fact that the 28-year-old was involved in practice in some capacity coming off the Chargers' Week 6 bye bodes well for his chances of being available Sunday against the Jaguars. Ideally, Allen would assuage any concern about his status by upgrading to full practice by Friday.