Two things: "The first step of treatment is to release the muscular spasm. While this can be accomplished in a variety of ways, the most successful treatment I have encountered is that of Active Release Techniques. By breaking up the pain-spasm cycle, the patient then becomes mobile enough to function, and to start the next phase of treatment. This second step is that of rehabilitating the stabilizing muscles of the spine. In most cases, these muscles need to be stimulated and strengthened so that the next time a movement is initiated, these muscles will contract first, preventing further injury."
I think he can play limited reps if his rest and treatment go well. He's probably able to play 30% of the snaps. I wouldn't think he could go over 50%.
http://elitesportstherapy.com/a-new-spin-on-sudden-onset-low-back-pain/