Sig 1 - 4: 5/10 = 500K
These are a great start to your visual creative career. Your spacing is very good and sticks to the safety of the "rule of thirds". The jersey swaps are a welcome effort and will take you far in having your pieces appreciated on the site.
Some easy spots for improvement:
- Your text in the first sig is a typeface that matches the background element, and the second one is pretty good as well (although a bit harder to read). establishing a theme or feel to your composition will help guide decisions during the creative process, and having everything match all the way through will have all of your pieces looking more intentional. ex: the andros sig's background is very geometric. selecting a font that compliments this will tie it all together more smoothly.
- The lighting is a little off, in that the render and background don't look like they are part of the same picture. an easy way to manipulate this (in photoshop) is to use a levels filter (alt click so that it only affects the layer below) so that your whites are white and blacks are black, and your midtones won't get as washed out.