A shocking story to some, more of an “I told you so” to others, Rafael Palmeiro — long held to be one of the good guys of Major League Baseball — has tested positive for steroids and has been suspended for 10 days. Palmeiro has already denied that he took a banned substance, but that emphatic denial before Congress several months ago isn’t looking so good. Nor is his shot at Cooperstown. And that’s a shame, given his otherwise admirable career.