Historical clue formulations

• Dick ___, Pro Football Hall of Fame coach who popularized the zone blitz — 2015-06-14
• Longtime N.F.L. coach whose name is French for "the handsome" — 2014-08-29
• Coach Dick in the N.F.L. Hall of Fame — 2010-10-24
• "Hogan's Heroes" corporal — 2000-10-29