I believe this training is going to prevent my son’s arm from hurting and allow him to reach his goal of playing college baseball. We heard about Justin and the DVS system from the USPBL at Jimmy Johns field. We were impressed with Justin’s professional baseball experience and the science and data behind his program. My son Brendan has been training with Justin and Josh since June. Brendan really likes training with both of them and is seeing results. I like that Justin encourages the parents to be involved with the training. Brendan is JR and has goals of playing Div I baseball. We both like that he is learning the correct mechanics that will protect his arm and allow to pitch at his highest level. The 40 minute weekly sessions work great with his other baseball practices.