The Foreign Substance Theory
Or... Justin Verlander found another way to have the 3 lowest WHIPs of his career at ages 34, 35 and 36. Can you name another pitcher ever to do that?
Closest I found was Charlie Morton, who had his 3 lowest WHIPs at ages 33, 34 and 35.
Guess what else Verlander and Morton had in common at those ages?
(Ok, Morton was on Tampa at age 35. But where did he learn this?)