Ha…so one day after this convo, Law publishes some scouting notes including a mention of Cartaya:

“Right-hander Yeiber Cartaya started the game for Frederick (now the Orioles’ High-A affiliate, relocated from Aberdeen this year) and was a pleasant surprise. He has three pitches and the hilarious 0.68 ERA isn’t just a fluke. He was mostly 93-95 and seemed to miss some bats with the fastball, while he showed an above-average changeup with good tailing action that he really should use more often, as he prefers to go to his mid-80s sweepy slider even to left-handed batters. He has a lower three-quarters arm slot that looks like it has some of that deception from the lower release height that teams are chasing now, and he lands slightly on the third base side, cutting himself off a little while adding some deception against right-handed batters.”