c'mon EVERY pitcher leaves the rubber with back foot, only difference is stong rotators rotate off plate, linear pitchers go straight off just like this. Look at the toe drag; if u look at the mound after any game from LL up you will see
marks from the same motion 9/10 times. Look at video of pitchers, like u would if u were teaching a pitcher; ALL of them leave the rubber with the back foot, part ofg what their instructors/coaches look at is HOW they leave the rubber
Brown well off rubber at release