Just some food for thought...
Published on the ASA website (Plays and Clarifications, May 2012):
For the past few months or so we have been asked about a pitching style called a "Push, Drag, Push" or a "Crow Drag" in Women's and Junior Olympic Fast Pitch. This is described as a pitcher that pushes from the pitcher's plate, drags her pivot foot, stops and pushes again. We have been told that there are some indicators like a bent leg or the pivot foot bearing weight as a factor in this style of pitching. We have looked at several videos and several pitchers. We disagree that any of these pitchers are pushing, dragging, stopping and pushing again. We can see what appears to be a pivot by the pivot foot at the end of their delivery but not a re-push.
Nowhere in the ASA rules does it state anything illegal about the pivot foot bearing weight or the leg being bent. As long as the pivot foot starts on the pitcher's plate and pushes away, remains on the ground within the 24-inch width of the pitcher's plate and the arm continues without stopping in the delivery, it is a legal pitch. The pitcher opening her hips causes the foot to turn (pivot mark in the dirt) and then with pivot foot remaining on the ground (drag mark), the pitcher then closes her hips which produces another pivot mark in the dirt. This is not an illegal pitch by ASA pitching rules. We would also add, it is not possible to push, drag, stop and re-push while the non-pivot foot is in the air. It is possible to re-push if you leap and land.
From the ASA rule book (Rules Supplement):
Much attention and discussion has been given to recognizing
the differences between the crow hop and the leap on the pitching delivery:
1. A CROW HOP is defined as a replant of the pivot foot prior to
delivering the pitch. This can be done by (1) sliding the foot in
front, but not in contact with, the pitcher's plate; (2) lifting the pivot
foot and stepping forward; or (3) jumping forward from the pitcher's
plate with the pivot foot prior to starting the pitch. Umpires should
look at the location of the pivot foot when the hands separate, the
start of the pitch. If the pivot foot is off and in front of the pitcher's
plate before the hands separate, this would be a crow hop and
an illegal pitch should be called.
2. A LEAP occurs when both of the pitcher's feet become airborne
on the initial move as the pitcher pushes from the pitcher's plate.
In the WOMEN'S and YOUTH Fast Pitch divisions the pivot foot
must stay in contact with the ground following the push off from the
pitcher's plate (*If a hole has been created, the pivot foot maydrag
no higher than the level plane of the ground.)