BALTIMORE — Few things related to the consumption of sports have changed more in the last decade than their measurability. The fan (or the writer) knows more now about what he has seen than ever before. This is a deliciously good thing, an endlessly clickable supply of statistics to better define performance beyond the final score and the often duplicitous eye test. But in the end, sports are still a zero sum operation, where somebody wins and everybody else doesn’t. That’s the simplest statistic of all, yet it occasionally gets lost.