There are three often-violated rules in girls' fast pitch softball that are misunderstood by many pitchers, coaches, and even some umpires, and consequently are often not enforced.  The first two rules (regarding crow hopping and leaping) are designed to prevent some pitchers from having an unfair advantage over other pitchers…and batters…by unfairly releasing the ball closer to the plate.   These two definitions and rules are often misinterpreted, and wrongly used to define each other.  What we offer here is an attempt to clarify the meaning of the three rules so they can be more uniformly understood and complied with:
 

1)   A CROW HOP is not the pitcher's failure to drag the push-off foot along the ground.  A crow hop is, as the name implies, a "hop" off the pitching rubber by the pivot/push-off foot (typically moving it forward a foot or more) to "replant" it and use it for a second push-off point.  It is an illegal act.

In their rulebooks, the USSSA, ASA, etc. offer essentially the same definitions for "crow hopping":

          ASA - "A crow hop is defined as the act of a pitcher who steps, hops, or drags off the
          Front of the pitcher's plate, replants the pivot foot, establishing a second impetus
          (or starting point), pushes off from the newly-established starting point and
          and completes the delivery."

          USSSA -  "A crow hop is the replanting of the pivot foot prior to delivery of the pitch."
  Additionally, under USSSA Pitching Rules:
         "Pushing off with the pivot foot from a place other than the pitcher's plate is illegal. 
          NOTE 1: It is not a step if the pitcher slides (her) foot in any direction on the pitcher's plate,
          provided contact is maintained.
          NOTE 2: Techniques such as the "crow hop" and "the leap" are illegal."

 

2)   LEAPING can be caused by a failure to "drag" the pivot/push-off foot.  Leaping, in fast pitch softball, is the act of having both feet off the ground at the same time (as shown in the photo on the right). 

 

Therefore, the pivot/push-off foot usually is dragged along the ground until the stride foot lands (leap-with-drag pitchers) ,  or remains in contact with the pitching rubber (for some stepping-style pitchers).

  

Again, here are the more official definitions:

          ASA - "LEAPING. (Fast Pitch only) An act by the pitcher which causes the pitcher to be airborne
          on the initial move and move from the pitcher's plate.  This is an illegal act."
          Additionally, under the ASA Rulebook Pitching Regulations for Fast Pitch Softball:
          "The pivot foot must remain in contact with or push off and drag away from, the
          pitching plate prior to the front foot touching the ground, as long as the pivot foot
          remains in contact with the ground."
 
          USSSA -  "A LEAP is when both feet are airborne."
          Further, the USSSA's Pitching rules state:
          "The pivot foot may remain in contact with or may push off and drag away from,
          the pitching plate prior to the front foot touching the ground, as long as the pivot foot
          remains in contact with the ground."

3) SIDE STEPPING is permissible, but within the context of the rule.  Some pitchers, particularly those who are stepping-style pitchers, are often taught to not step directly forward toward home plate, but instead to step to the side to gain an advantage with the "closing" (or twisting of the trunk) process.  Stepping to the side must be restricted to the width of the pitching plate.  Here is the ASA rule:

          ASA - "In the act of delivering the ball, the pitcher must take one step with the non-pivot foot
          simultaneous with the release of the ball.  The step must be forward and toward the
          batter within the 24 inch length of the pitcher's plate."