I completely agree with their grades on Minter's 60+ FA (I think it's closer to a 70 grade) and 60+ SL (though I would classify it as a FC).
The blurb on Minter is extremely interesting:
"Minter’s success is due in large part to the flat plane he creates to the plate: he’s short, has a low slot, throws a four-seam with some rise on it, and often locates it up in the strike zone. For a power hitter with a lofted path trying to hit a very flat pitch, there’s very little space where those two planes overlap, thus a plus fastball plays even better."
Kiley cites the rise of Minter's fastball allowing it to play up (which is why I have it as a 70 while they say 60/65), but refers to it as "flat".
This is a difference in terminology. When tools like pitchfx report vertical movement on a pitch, it is reported as movement compared to a pitch with zero magnus force on it (as if it were in a vacuum). Any pitch with any amount of backspin will "rise" compared to a pitch with zero magnus force acting on it. This is why a good sinker still has 2"-5" of "rise"...it's just much less "rise" than a good 4-seamer (9"-11").
Minter gets about 10" of rise on his fastball, which is 55/60 grade rise compared to all other MLB FAs.
On the other side of the coin, Fried only gets about 7" of rise on his 4-seamer. That is 35 grade compared to MLB FAs, and 40 grade for MLB sinkers. It's right in that danger zone between a sinker and 4-seamer, and is why it always gets hammered despite being thrown 93 MPH. That is what we call a "flat pitch", though that's admittedly not the best term to use.
While no pitcher actually throws a pitch that really rises (or even stays completely flat), that's just how the terminology evolved.