Blackmon is dealing with tightness in his groin and hamstring. Shorts injured the joint that connects his breastbone and collarbone in Sunday's loss at Denver. He was still in pain Wednesday, but was able to turn his head and lift both arms above his shoulders for the first time in days.
The Jaguars (0-6) also are without rookie Ace Sanders, who is being evaluated for a concussion, and Stephen Burton. Burton missed the last three games because of a concussion. He was on the field Wednesday, but still hasn't been fully cleared to practice or play.