Made me think of this man immediately!
I remember a pitcher like that when I was in Babe Ruth leagues in Michigan. He had a streaking fastball but irregular control. I always hated to come to the plate when he was pitching. I had/have a small enough strike zone to begin with and always felt that facing him was like facing a drunk with a gun.
I remember one pitch that came right at my head and, when I went down to avoid it, it struck the bat that had been over my shoulder ... if I hadn't been down on the ground, it would have been an easy single. As it was, I was thrown out at first by the center fielder.
He always walked/hit a lot of batters, but when he was on, he threw easy strikes .. we were all standing so far away from home plate that you almost couldn't reach the pitch with a four-foot 2x4.