How he does it is that the Phillies lineup has been broken now for weeks. Turner is the only guy hitting in July. Lively is whale shit with mediocre stuff. He’s a KBO pitcher who is pitching over his head.
I do think he's overperforming, but I think you're being a little too dismissive. Yeah he'll likely see his ERA end up much closer to his xFIP (4.27) or FIP (4.47). Not great, but still useful. Besides, the rotation outside of Bibee/Lively has been a tire fire. Too bad they weren't in a better position to sell higher on him