Entering play Tuesday night Major League Baseball had an overall batting average of .236. It’s the worst league BA since 1901. The entire league seems mystified by some combination of velocity, movement, and tunneling currently being deployed by major league pitchers. Well, everyone that is except the White Sox’ Yermín Mercedes. The 28-year-old spent 10 seasons in the minors and wasn’t on anyone’s radar until an injury to Eloy Jiménez at the end of Spring Training gave him a shot at the big league roster. Since then Yermín’s used that roster spot to post an MLB-leading .