C77fastpitch wrote:A leap is a drag of the back foot, legal in all softball!
WTF? Perhaps you're confusing it with the "leap and drag" which is legal. Hear is the rule.
NCAA 10.4.5
Leaping is not allowed. The pitcher may not become airborne on the initial drive from the pitcher’s plate. The pivot foot must slide/drag on the ground.Nevins and Escobedo both get airborne. It's easy to spot on the replays and the leap precedes any subsequent replant.
A crow-hop is second planting of the back foot, illegal in womens ball. It is impossible to plant a second time and not push with it, a plant is a second push, gravity and all. The two pitchers you mention both crow-hop, using leverage to increase throwing speed.
A crow-hop can occur multiple ways. The one that typically gets called is the pitcher moves their pivot foot forward of the pitcher's plate while they're winding up for their initial push.
NCAA 10.4.6
Crow hopping is not allowed. The pitcher may not replant, gain a second starting point and push off her pivot foot. Once having lost contact with the pitcher’s plate, the pivot foot may trail on the ground but may not bear weight again until the pitch is released.