No, this is not a trade of injured players, but an operation:

The damage to right-hander Zack Greinke’s collarbone came more into focus Friday when the Dodgers announced he would have an operation Saturday to have a rod inserted to stabilize his fractured clavicle and be out about eight weeks.

…

The injury to the right-handed Greinke is to his left collarbone, so the Dodgers are probably crossing fingers that he can start throwing earlier than if it had injured his right shoulder.

It could have been much worse.