The Rams held a walk-through practice on Tuesday and Robinson was listed as a non-participant for the second straight day. He suffered a shoulder sprain in the Rams' Week 14 win over the Bills, and now is trending to miss a Thursday Week 15 matchup against the 49ers. Jordan Whittington (shoulder) also missed practice Tuesday. Both Robinson and Whittington will need to practice Wednesday to have a chance at playing and producing on a short week.