fillip ball alias the the butterfly ball joint ball , baseball pitcher threw a special trackball Road . Is a changeup .
rather fillip ball is called butterfly ball , its trajectory like a butterfly fluttering , like erratic , sometimes even the catcher does not pick a good catch . This particular change in the grip of the ball there are many, some pitchers bend the fingers against the ball with nails , some with your fingertips to clasp the ball, and then the rest of the other fingers hold the ball . The pitching arm swing do not have to very hard , mainly relying on finger stretch when the straight pop up the ball to go , so called the fingertips ball . Pop - up ball almost no rotation , it will generate quite a lot of turbulence , so the ball will fly to where the unpredictable , like butterflies , it is named as the butterfly ball .
catcher , this is the the ball most challenging species .
pitching essentials :
shot must be neat , and there must be efforts ( concentrated in the finger , the beginners always hard on the arm or wrist ) , with the elbow and thrown wrist action , pop up the ball vigorously , so they would not the mere finger modest force to the ball ahead of landing into balls . If the action is dragging its feet, will be shot the moment , the finger will ball driven up into a back spin .