I started throwing a forkball in the summer after my freshman year. At first I was just playing around when I threw it, then I started throwing it in bullpens, still just playing around with it. Then I threw it in a game, it was the catchers idea because the coaches weren't calling pitches in the summer. Fast forward to now, and it's a filthy pitch, but it is difficult to control at times. I say in a 7 inning start i would throw 2-7 forkballs. It works well to get double plays and also as an out pitch.