Until Aceves actually 'pitch', he cannot close games cleanly. He's overthrowing by a country mile. He doesn't need to throw 95 to be a closer, and he thinks he has to. And he beans batters at an alarming rate.
Tazawa comes in last night, locate his fastball and changeup/splitters on the corners. That is pitching. He also mix in a biting curveball. These three pitches look above average, especially the splitter/change. With more time he can really polish that curveball to be a plus swing and miss pitch he can throw at will. Getting 8 swing and miss in 3 inning is excellent.