If you take an image that is owned by someone else, no matter how much you change it, it still belongs to the rightful owner. There is a myth that if you change an image so much, it becomes yours. That is just not true, in fact changing it only shows the intent to infringe on it and hope no one notices. The only way you can change an image and use it is to change it 100%

Which means not using it at all.
As far as logos and team names the same goes, just because you change it doesnt mean its not still protected

It is illegal to use and copywrited images or trademarked logos.