I wanted to get some insight from the experts on pitching with a weighted ball in the off season to increase speed. I will tell you that 13 yr old DD goes to an instructor that stresses speed, we have thrown the weighted ball for the last three off seasons and have seen steady improvement in speed. We will not touch a regular ball until 2 or 3 weeks before travel/school ball starts. We start off throwing about 50 to 60 per lesson and move up to 120 per lesson, we also throw at least three other times per week usually 50 to 80 per session. This is a proven instructor that has produced several quality pitchers that played at the college level. I have heard some pitcher's parents saying their PC says under no circumstances should you pitch from full distance with heavy ball, any opinions??