The Raiders could be without DE Clelin Ferrell, LB Nicholas Morrow and S Johnathan Abram when they play the Chargers on Thursday night. Morrow and Abram each left in the 4th quarter of Sunday's game with concussions. HC Jon Gruden said Monday they're in the concussion protocol. The short turnaround for Week 15 makes them unlikely to be ready. Ferrell left in the 1st quarter with a left-shoulder injury. Gruden also said it will be "tough" for Ferrell to make it back for Thursday night, according to SB Nation's Bill Williamson. We'll keep an eye on their statuses, but plan to have none of the 3 available for IDP use. Ferrell's absence would likely mean starter-level snaps for Arden Key, after DE Carl Nassib was a healthy scratch the past 2 weeks. Morrow's absence should mean a playing-time boost for disappointing LB Cory Littleton. Dallin Leavitt looks like the fill-in for Abram, with Jeff Heath's concussion having landed him on IR Saturday. The Raiders also might continue to miss starting CB Damon Arnette (concussion).