Stay away from sports in signatures; I have yet to see a good piece come out with sports as the main theme.
The render doesn't blend at all with the background, mainly because you blurred the fuck out of it.
As I said on the other piece of yours, the text and the borders are a no-no.
Don't put your render in the center of the tag, put it a little to the left or a little to the right, but never in the middle.