Marco Gonzales looks a lot like Alex Wood, in wind up, in fastball velocity and movement, with best pitch change-ups that also move similarly (though Gonzales' is slower) and are used similar percentage (~25%), and 3rd pitch curve balls, though Wood certainly uses his more often, it seems to be agreed that Gonzales' is an actual tool more than a show-me curve ball. Maybe Dipoto sees something of a similar break out opportunity? Similar to O'Neill, Gonzales seemst o have found himself in the last 6 weeks or so, where he's run a 7.8 K/9, 1.9 BB/9, 0.5 HR/9, and a 2.61 ERA since June 18 when he returned to the minors after an unfortunate spot start.
O'Neill was still scuffling a lot at home and against RHP with a 30% Ks and a ~.200 ISO in either situation. Right now, he's not much different from Eric Thames circa 2012, which the Mariners netted for Steve Delabar.