reliever


reliever (http://definr.com/reliever)

     n 1: someone who takes the place of another (as when things get
          dangerous or difficult); "the star had a stand-in for
          dangerous scenes"; "we need extra employees for summer
          fill-ins" [syn: stand-in, substitute, relief, backup,
           backup man, fill-in]
     2: a person who reduces the intensity (e.g., of fears) and
        calms and pacifies; "a reliever of anxiety"; "an allayer
        of fears" [syn: allayer, comforter]
     3: a pitcher who does not start the game [syn: relief pitcher,
         fireman]