It does happen on rare occasions with the "skill" ratings (as opposed to the "physical" ratings). As iain pointed out, you have to have the right set of circumstances to even allow for the possibility (training, makeup, playing time, maybe something else) and even then it's no guarantee (in my experience).
I don't think it should be much more common, though. You named three guys, and I could argue only Moyer *really* fits the idea you're going for since Maddux was "clinical" throughout his career and Pedro was never nearly the same pitcher once the physical tools/injuries changed (him). These are the exception, rather than the rule.