1) "Contarse" here is to add. There are those who are hurt and those who are not in good shape... all of them add together.
2) I'm not sure about "señorito" here, but it might be that he has an elegant style for playing.
3) "Requerirles" here means that the Stuttgart won't be easy to defeat.
Bad news, Bob, is that sports writers fill their articles with ornaments, metaphores, and unusual expressions to make them look more brainy, but that's never a natural use of language.