Thanks for cutting in Shep. Low has shown great knowledge in the past. The weighted ball program is reportedly being used by some minor and major leaguers. I have been told by a friend that Papelbon is one who swears by them. This guy is connected to the organization, so maybe its true. I have heard of injuries due to improper use of the weighted balls, thats why I strongly suggest that the player using them should be monitored closely.