Text effects are nice, left side is a little bare. Add some more text on top of your current, 'OAKLANDRAIDERS' or 'WIDERECEIVER' or something of the sort, just to occupy some space. Colour is nice though. KIU.
You're improving for sure, but you're still missing certain things - good text, putting some textures over the render for effect and i'm not sure if it's your fault, but on all your sigs you seem to have a very LQ render, choose HQ ones. You're getting there though, KIU.
I think this sig was just to model this new text effect you've got going on, if you worked on the rest of the sig more, it could be a good one. Make the text smaller and add some more stock, lighting in the free space.