LOL, didnt realize we are running an English lesson here?! Both the sentences are correct, by the way. Is Asik, Williams, and Garcia still injured? - this refers to individual Are Asik, Williams, and Garcia still injured? - this refers them as a group/team Hence it all depends on the context of the subject of discussion.
I have questioned this move from the beginning. Camby was like the most fragile big man in the league 10 years ago, how is it possible that he can stay healthy now? I hope they cut him.