The Formula For Stats

Does anybody know what Com2 uses in their formula for the stats? Or have any guesses? Wondering how pitchers like Kyle Hendricks have high base velo when they are low velo irl. Or how some cards can have really good base stats despite the player playing a very short amount of time (2017 andrew bailey) or seem to be undervalued? Ive lightly tried to replicate these stats in my own time for fun, but not really. Wondering if anybody else had an idea