He's not. Marshall, was really, really good as a relief pitcher (probably could even call him elite). Since Marshall has become a fulltime relief pitcher (2010) he has put up fWAR's of 1.9, 2.6 and 1.7, in the same time frame (2010 happened to be Russell's first year up as a relief pitcher) Russell has put up fWAR's of -.3, -.2, and .8 I think Russell has his uses, but he's hardly above replacement level. That's valuable when you have him cheap for team controlled years but I have no real interest in extending him once he hits FA and/or gets expensive in arbitration. Marshall is on another level compared to Russell.