Pitcher's arm back limit ??

[bobbrix]

(not sure if this has come up before)

for a pitcher who brings her arm back behind her and then forward for the “one revolution”, is there a rule for how far back her arm can go ??

seen one last week who was bringing her arm back to shoulder height as part of her delivery

so it looks odd and she ends up with at least one and a quarter revolutions (or one and a third)

the ump was questioned about it and said it was ok

don't have my rules with me here, but i believe the rule states 'not more than one revolution' and at the same time says the pitcher can 'drop her arm to the side or back' as part of the delivery

if her arm goes back, that's automatically more than one revolution ... isn't it ... ???