PUREPOWER® Baseball / Softball Weighted Hitting & Pitching Training Ba
Amazon.com : Plyo Soft Shell Weighted Ball Set 32, 21, 14, 7, 5, and 3.5oz-Pitching/Throwing Velocity Training for Baseball and Softball : Sports & Outdoors
CHAMPRO Advanced Weighted Training Baseball Set of 3 Balls; 10, 11, and 12 oz - Walmart.com
Amazon.com : SHOP PLAY 9 | Plyoball Weighted Ball Baseball Set (with Seams) Set of 6 for Pitching and Velocity Training : Sports & Outdoors
Amazon.com : Franklin Sports MLB Weighted Training Baseballs + Softballs – Pack of 3 – 12.5 Oz – Heavy Balls for Hitting, Batting Practice : Sports & Outdoors