He absolutely has to improve his free passes (including WP's) over the course of the second half. If he can't? He'll likely go unprotected. As I've said on several occasions: Absolutely has MLB 'stuff'. Undeniable. BUT, each and every season, at various junctures he loses his ability to harness any aspect of his top-shelf tools. It's a problem. 21 K: 20 BB on the season. 2.22 WHIP in May. He needs to find that form of April where he was still walking too many guys but his elite tools were shutting threats down with force and dominance. We can work with a 1.38 WHIP at this stage if the other team can't hit you. It's tough to work with 11 BB in only 9 IP when the other teams are hitting 0.257 BAA.
Either way, what he has innately is special. AND, he just turned 22 years old in late March so the addendum here is: time is on his side. But, an honest assessment (as you've shown here), would still classify him in the same tier of 'Unknown' with talented RHP's Jesus Rivero and Quinton Low. All three have shown stretches of brilliance. All three have shown stretches of confounding ineffectiveness. Of the three, Rodriguez IMHO shows the most MLB-caliber of stuff.