Tha's sad but hardly a surprise. He always has a shoulder issue but it's usually later in the year. Having it flair up so early in the new season was a big red flag. Hopefully this clears up his shoulder and he can still pitch for a few more years without the pain.

You realize the FruitBat is signed for another 3 seasons? It's an absolute waste to have Joba pitch as a set-up man for 3 years until the FruitBat spreads his wings and flies away. The kid has four potentially plus pitches, something Papelbon can't even sniff. Paps has two plus pitches and he's working on his slider, which currently stands at fringy. Papelbon's stuff plays up better out of the pen because he can dial his fastball to 97 and let it go. Joba pitches well out of the pen but his stuff plays up better in the rotation. I think they are poorly executing this shift, most definitely. Send him to AAA for a month because not only is he stretching himself out but he needs to re-integrate his other pitches back in. It is horrible that they are forcing him to re-learn how to start at the major league level. I have some health concerns long term about him. I've read how he runs into trouble keeping his mechanics when he's starting and he comes close to throwing with an inverted W arm action so I have my doubt as well but not enough to keep him in the pen. mahalo
~Chach~