The point here is that, when spinning on the same axis and no gyro, there is no difference between a 2-seam and 4-seam pitch.
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Why am I interested in Baseball Drag? Post #2
In 2015, the number of home runs increased over 2014 by an amount larger than one would expect from year to year fluctuations. In 2016, MLB experienced a similar increase In 2017, the number of home runs increased again. Many fans believed that the increase was due to a deliberate Continue Reading
Previous study of 2 vs 4 seam pitches Post #1
RPP tackled the same question (why 2 and 4-seam fastballs are different) back in July and came to the same conclusion (that seam orientation in itself does nothing) but from the opposite direction. They showed that a 4-seam pitch with side-spin induced at release would run the same way as Continue Reading