Of the ways for a baseball season to be wounded, perhaps mortally, having it splayed beneath a toppled and smoking motorcycle would be among the least common. Now Bumgarner, ace, legend and surreptitious dirt-bike jockey, has a sprained pitching shoulder and bruised ribs, injuries that could cost him a large part of his season and the Giants all of theirs. Needless to say, Bumgarner never should have mounted that motorcycle, because motorcycles are inherently wonky and dangerous.