Go and watch some of his highlights reels. Charlie says he has been studying him, and Richie does indeed go one handed quite a bit. The problem for the defender is it makes them think you are going to offload, so you try to smother tackle, which actually causes you to miss the tackle. When Richie thinks/decides he needs to chip ahead, he carries the ball well in front of him in both hands. It means he can drop it and chip much faster.