Marshawn Lynch as been battling a few injuries in the early going this year, including a pulled calf, a slight neck injury, and most recently, a hamstring strain. The Seahawks are taking a wait-and-see approach with Lynch this week and he's scheduled to get another MRI at some point, but according to Adam Schefter, Lynch will be "50-50" for the Lions on Monday Night Football.
If Lynch can't go, the Seahawks will likely roll with Thomas Rawls as the primary back, spelled by Fred Jackson in 3rd down situations, and Derrick Coleman is also a player that could pick up carries if Lynch sits.