What does that have to do with the fact that Good's a really good athlete?
I remember at South Dade that Antrel Rolle and Charlie Jones (both of whom went to UM) were on the same team at the same time (Rolle's senior year). Rolle was regarded as an athlete and barely played CB while in HS (was highly recruited though), but he played just about every other position - QB, WR, etc.. Charlie Jones (as a Sophmore) was just the RB, so of course he had more yards than Rolle did in terms of offense.
Good's used in the same capacity where he's used all over the offense, so of course he's not leading the team in carries.
But Good's a really good athlete, not saying he'll be the player that Rolle was, but just proving a point.