Did you see this: http://insider.espn.com/blog/buster-olney/insider/post/_/id/18519/olney-hitters-who-cant-beat-the-heat-getting-left-behind Braun is hitting .151 against 96+ mph fastballs since 2016. It's possible he's starting his swing a split-second sooner to keep up, and that's why he's having more trouble laying off bad pitches. Usually this is manifested in k% and bb% both going in the wrong direction, but Braun has incredible hand-eye coordination for making contact and appeared to acquire more patience (and less overconfidence) as he aged, mitigating the damage in 2016 and 2017. This looks like the year it's all coming unraveled though. Incidentally, Cain's slight uptick in bb% and decrease in k% last year, combined with his incredible sb/cs ratio and sustained elite speed in the outfield, were probably big factors in the Brewers deciding to take a chance on him despite all the evidence that a contract like that for a 32-year-old is almost always a bad investment. The guy is somehow still in the middle of his physical prime, and the Brewers are looking like geniuses for signing him when hardly a single free agent is paying off for any other team. Does it say what he hit against that speed previous to the last couple of seasons? He can start earlier but needs good pitch recognition or he will continue to struggle. Also, lessen the length of the bat.