At age 67, New York Giants head coach Tom Coughlin has indicated that he has no immediate plans of retiring anytime soon, but since getting off to an 0-3 start in 2013, one cannot help but wonder if Coughlin may reconsider this decision at year's end.  Should Coughlin decide to call it quits, it is highly unlikely that either offensive coordinator Kevin Gilbride or defensive coordinator Perry Fewell would be chosen to replace Coughlin as head coach.  Assuming that the Giants do decide to hire from the outside, here are five names that Big Blue should have on its short list.