From the developer chat with patrickm885 back in 2009:
"Does the order of a pitcher's pitches make any difference in his performance? IOW, does a pitcher with pitches 90, 80, 70, 60 perform better than one with pitches 60, 70, 80, 90? (ArlenWilliam - Hall of Famer - 4:36 PM)
The order of the pitches doesn't matter; but the ratings certainly do."
Seems to contradict himself two years later.