Andrew McCutchen, Eric Thames, and the Life of a Slump
Slumps and downturns are inevitable. They’re a part of baseball, a part of markets, a part of life. If you create a 15-day rolling wOBA chart of any player at FanGraphs, you’ll probably find a trend line that ticks up and down like the display on a heart-rate monitor. Such charts probably have a look similar to the performance of your investment portfolio. If we could create rolling, 15-day charts documenting the fortunes of our day-to-day existences, they’d have similar fluctuations, too.
While slumps are inevitable, that doesn’t mean they’re welcome. Ideally, it would be possible to minimize the troughs while extending periods of peak performance. Naturally, this of some interest to major-league clubs. Organizations have become curious about how they can reduce the length of slumps, exploring areas like rest and nutrition.
But there’s also a personal, psychological element. What leads players into slumps? Do they sense the arrival of one like an oncoming cold? And how do they dig out of it?