Except pitchers injure their arms all the time. I have yet to see the "hit by a bus," and the closest I have seen to West Nile Virus is Kyle Gibson last year (and his e coli and ulcerative colitis, or whatever he had, didn't affect his contract as much a poorly timed shoulder impingement would have.) Berrios might be looking at Wheeler money in - what is it, 3 years? - if he stays healthy. That's a long time in a pitcher's life - if he can get some guaranteed money now in exchange for a discount off current value later, he might want to consider it.