54 Cassius Marsh DE

Marsh had three tackles (two solo) and two sacks in Sunday's 14-9 loss to the Bears.

Marsh has been feast or famine for much of the season, as he now has 5.5 sacks, 2.5 of which came Week 9 at Oakland. The 26-year-old played 29 of 64 defensive snaps Sunday while continuing to serve in a rotational role at defensive end.

Marsh (concussion) is active for Sunday's game versus the Seahawks.

Marsh cleared the league's concussion protocol and will return to his situational role on the 49ers defensive front behind Solomon Thomas. The fifth-year pro has 3.5 sacks in 13 games and holds limited IDP value.

Marsh (concussion) is listed as questionable for Sunday's game versus the Seahawks, Matt Maiocco of NBC Sports Bay Area reports.

Marsh was forced out of Week 14's game against the Broncos and landed in the league's concussion protocol. Although he's not a starter, Marsh plays a respectable role in the 49ers defense by averaging 35 defensive snaps per game. Ronald Blair will see an uptick in usage if Marsh can't go.

Marsh has entered the league's concussion protocol, Matt Maiocco of NBC Sports Bay Area reports.

It's unclear exactly as to where Marsh obtained the injury, but there's a chance he'll be forced to miss next week's game. Given the nature of the league's stance on head injuries, Marsh will have to prove beyond all doubt that he is symptom-free before he can make a return to the gridiron.

Marsh had four tackles (three solo) and 2.5 sacks in Thursday's 34-3 win over Oakland.

Marsh was a force off the edge against a Raiders offensive line that was without tackle Donald Penn, setting a new career high in sacks. The 26-year-old had just one sack coming into Thursday's contest, and his situational role limits his upside as an IDP option despite the career day.