Sports Health July/August '09: Baseball Pitching Biomechanics in Relation to Injury Risk & Performace- Fleisig et al.
Unless I am reading the article wrong, the authors are advocating propelling yourself off the rubber during the stride phase. Those of you who heard me speak in the past know I oppose this for a whole slew of reasons. It sets up a cascade of poor mechanics.
However, these authors are no slouches. And, the pitcher in this pic is literally bounding off the rubber. Remember, the mound's decline would magnify this even further. But, unless I'm reading it incorrectly, not pushing off the rubber is in the "pathomechanics" category.