The smile on Willie Parker's face, the one Bruce Arians said he noticed on the practice field the other day, is still there, an indication that, after going through full practices for three consecutive days, the two-time Pro Bowl running back might be ready to return. Still, it is difficult to tell if the smile is an outward indicator of relief that Parker's sprained left knee is finally feeling well enough for him to return after missing four games; or, rather, if it is the forced ex...