Johnson was injured during the Bills' loss to the Cleveland Browns last Friday, but has returned home as there has been a death in the family.
"I'll get ready to call him here in a little bit," Marrone told Buffalo News. "You know, see how he's doing.
"Obviously he's working on getting treatment [for his back] out there. I really don't know until he comes back and we're able to talk with him and see how he feels. It's quite a long travel for him, to Oakland and back, so I really don't know."
Bills have begun the season with a 2-3 record.