Pitchers need to stop adding more pitches then they need it's a waste because you need to master the fastabll comand first before you can move to advance pitches like splitters and screwballs.
And not alot of pitchers can say they have pin point on the black control. what seperates good and bad pitchers is to throw the ball where you want to.
So master the 4-2 seam fastball and maybe a change-up then a curve. Then after you master alll thoughs pitches with very good control move on to something else.