FRISCO -- A rare immune disorder has kept the Pro Bowl anchor at the center of the Cowboys offensive line from taking the field.
The Pro Bowl guard has dealt with a sprained left knee for longer than he cares to acknowledge. The Pro Bowl tackle has dealt with a stinger, tendinitis in his elbow and a rash of penalties of late because - wait for it - the coaching staff believes he's too dominant.
None of this takes into account a college tackle making the transition to guard in his rookie season, the veteran lineman who lost sight in one eye for 24 hours or the position coach fired eight weeks into the regular season because things just weren't working out.