For the most part WHIP is a tried and true predictive stat... I disagree with that. I think it's one of those things that you eyeball and maybe come close. The problem with WHIP is that it completely ignores total bases. A single, a walk, and a home run count the same. To me, if you're going to use WHIP, you should be giving it a fair amount of breathing room along with supplementing it with other stats.