The 3rd guy,Gerardo Esparza, doesnt have the K ratio of the other 2 or the control but they must've seen something they liked.
K rates are way lower in the VSL than the DSL. No idea why. League-adjusted, Esparza's K rate was probably pretty similar to the others. (I'm too lazy to do the math.)
With a stat analyst examining all these guys, I guess it's no surprise the K and BB numbers are very good.