Kuma is a really risky player, difficult to determine what to do with him.
I could see him being traded and going back to his 2.66 ERA form, but I could also see us holding on to him and he struggles with injuries. Honestly there is a lot that can go right by holding on to him, and a lot that can go wrong.
Holding on to him is a high risk, high reward situation. But I do know that if we hold on to him and he struggles with injuries going forward, or is not the pitcher he used to be, we will be kicking ourselves. On the other hand though, will we even get anything worth a damn for him?
I like Kuma, but I wouldn't trust an important role to him with his history. If you were counting on him as a #5, then great because that is always a risk position anyways. If you were counting on him for a #2 or #3, then I wold move on. Plus, trading him doesn't exclude re-signing him.