Who taught Hunter Renfroe how to hit?
As crazy as it sounds, he's not actually performing that much different from his career averages. He's BABIP is up, but his ISO is down. Exit Velocity is up a bit, but his ground ball to fly ball ratio is high. For the most part, his hitting for the year isn't that far off from his career averages.
Now, that's definitely oversimplified based on how he's done this year. He's been ridiculous since May, and that's definitely well above his career averages, but there was also no way he was going to hit as poorly as he did in April.
Honestly, Tampa bailing on him to save $3M makes no sense when you see how unlucky he was last year.