For a couple years during Rams games it seemed like it was Robert Quinn who had Russell's number. I suppose Quinn chased Russell into Aaron Donald's arms a lot, giving Donald the stats credit.
It seemed at the time like Quinn was one of the few D-Line players faster than Russell and could run him down. That Rams D-Line had our number for several years, in a downright scary way. The Cable years, when our OL was unable to even slow down the Rams.