There’s a phenomena in baseball and other professional sports where a player, usually a rookie, has a fantastic inaugural season, goes into the next season with massive expectations, and then, well, puts up mediocre numbers to huge surprise and disappointment. This is often called a sophomore slump, but I’ve always thought of it as the whiplash effect. It’s so hard to be at the top of your game on a consistent basis, largely because there’s a fair amount of luck involved in that kind of success,...