Martin (concussion) was a non-participant at Wednesday's practice, Jenna Laine of ESPN.com reports.
Entering the concussion protocol Sunday in Atlanta, Martin hasn't reached his baseline marker, which would allow him to take part in portions of practice. If Martin ultimately misses Sunday's game at Green Bay, Jacquizz Rodgers, Charles Sims and Peyton Barber will split the running-back reps in same way, shape or form.