Wrecking Ball is all about being an expert on movement by knowing how to use his Grappling Claw and Roll abilities to your best advantage, as well as giving your team the upper hand. Going to the Training Facility within the game is the best and more effective way you will be able to practice these skills. Practice rolling around to gain speed, and play with the radius of the Grappling Claw. Also, continually playing as him in matches will build up your overall skill. Every map within Overwatch is different, so knowing how to use the specific maps and locations to your advantage is another way to unleash Wrecking Ball's full capability.