The Collaborative International Dictionary of English v.0.48:

Pitching \Pitch"ing\, n.
   1. The act of throwing or casting; a cast; a pitch; as, wild
      pitching in baseball.
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   2. The rough paving of a street to a grade with blocks of
      stone. --Mayhew.
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   3. (Hydraul. Eng.) A facing of stone laid upon a bank to
      prevent wear by tides or currents.
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   Pitching piece (Carp.), the horizontal timber supporting
      the floor of a platform of a stairway, and against which
      the stringpieces of the sloping parts are supported.
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