49ers running back Raheem Mostert wants a raise or to be traded. The problem for him is, he doesn't really have any leverage. Regardless of what he deserves, that's just the reality of the situation.
49ers coach Kyle Shanahan favors a running back-by-committee approach. He will be able to employ that, regardless of whether or not Mostert wants to be a part of it. The 49ers have ample depth at the position, even after trading Matt Breida earlier in the offseason.
Tevin Coleman isn't going anywhere. Cutting him would result in a $2 million dead cap hit, and San Francisco can't afford to waste cap space at the moment.