A sore arm is a sore arm, every single year multiple guys who pitched 200+ innings for 3+ years in a row get hurt. Pitchers get hurt that is just part of the game. This year already we have seen half of the top 10 pitchers from last year suffer through some sort of injury or massive ineffectiveness and it is only April. That is why I can't get too worked up over a pitcher getting hurt. The odds are against any of our pitchers staying healthy two years in a row except for maybe Suppan who has shown a skill for staying healthy. Here is what the www.disabledlistinformer.com site had to say about it. " Sheets will likely be evaluated and an MRI should be taken shortly. While this could simply be a strain of the triceps, it would not surprise me at all if this was a rotator cuff issue instead. The reason being, the triceps crosses part of the rotator cuff in the posterior aspect of the shoulder in what is called the "Quadrangular Space." The inner (long head) aspect of the triceps actually crosses over one of the rotator cuff muscles (teres major), and passes underneath another rotator cuff muscle - the teres minor. In between this intersection lies the axillary nerve, which, when compressed, can offer symptoms mimicking "stiffness" or "numbness" in the area of the triceps and posterior-lateral shoulder. In my clinical experience, I have seen very few baseball pitchers present with a pure, isolated "triceps strain" - rather, there is almost always an involvement of these rotator cuff muscles. A strained triceps certainly sounds better to the press than does a rotator cuff injury! If a DL stint is required, expect it to last the minimum 2 weeks, followed by a rehab start or two."