DeMarini Uprising -12oz Little League Bat Size is 28/16oz. Welcome to the Uprising! New for 2014 the Uprising line of bats features our revamped DX1 Alloy and Hybrid Performance grip. These bats have gone through the ringer with our R&D team to ensure that they have the perfect balance of performance and durability at a more affordable price. 12 Month Limited Warranty. All return and warranty issues must go thru Wilson Sports. 800-937-BATS.