McGarry is not fringy, he was a ranked prospect in the 2015 draft, #170/270, throws sinking FB in the mid-90s (at least when he was drafted).
Has been lights out in the FSL this season with a ridiculous GB rate.
Much better prospect than Hammer, who's in the Betancourt, Quinn, Hibbs category of hard throwing college pitchers who are long shots but might suprise if they master a secondary pitch.