For starters I'm not a huge fan of the whole white jersey on white background, I feel theres not much contrast over this whole sig. I like the layering and effects though as the render seems to be kind of coming out of the shattered glass/whatever else is going on in the bg. I'm not too high on the text though, I feel its super plain and could be spiced up quite a bit, even just adding a drop shadow to it or outer glow could have helped it out. Also some lighting somewhere around his face could have helped made this sig pop a bit more.