My almost-2 year old DD that is, not my 13 year old.
Of course, it was with her short-fat plastic bat, and rather than a softball for a target, she hit me in the knee while I was getting dressed for work. But, she had pretty good form, and I don't think there was much bat drag, although she needs to work on her hips a little....maybe the diaper is restricting her hip movement some.....