Is that Yennsy or Max in that gif?
Here's the Yennsy write up from fangraphs.
At a slight 6-foot-1, Diaz lacks size. Also his changeup and command are below average. Because of that, it’s likely a relief fit. That said, he has a 92-95 mph fastball that he can run up to 97 and knows how to use. He also has a curveball that flashes plus, giving him plenty of stuff to fit in the late innings. Diaz leans on the fastball heavily but has the plane to make it work up in the zone, drawing swings and misses on the pitch. He uses his changeup more than his curve, in an effort to develop the pitch and remain a starter, but his numbers could take a step forward if he moves to relief and largely drops the changeup.