EAST GREENBUSH, N.Y. — Few, if any, athletes across Section 2 are more competitive than Burnt Hills-Ballston Lake junior John Klopfer. Klopfer, a standout Spartans boys’ varsity basketball player in the winter, transitions from the hardwood to the pitcher’s mound in the spring, anchoring Burnt Hills-Ballston Lake’s varsity rotation. He wouldn’t have it any other way, noticing a key similarity between the game he plays on the hardwood and the one…