McKissic fractured a bone on the outside of his foot two weeks ago, and the timeline for his return from the Jones fracture was 4-6 weeks. He is eligible return from IR after missing a minimum of eight weeks.
SEA RB J.D. McKissic - Week 13 Fantasy Football Outlook
Week 13 vs. Philadelphia Eagles
Eddie Lacy was given an opportunity last week as he played more than J.D. McKissic, but really didn't produce very well. That should push more touches to McKissic in Week 13 against Philadelphia.
The Eagles are ranked No. 1 in aFPA to running backs and with the chaotic Seattle running back situation and poor offensive line, there is no reason to play McKissic against Philly even though he is Seattle's best fantasy option. Keep him on the bench.