Lowest slugging allowed on four-seamers, 2021, per Statcast:

Min. 75 PAs ending on 4-seamers (284 pitchers)

1. Dylan Floro (MIA): .179
2. Josh Hader (MIL): .186
3. Reynaldo López (CWS): .231
4. Darwinzon Hernandez (BOS): .233
5. John Curtiss (MIL): .238

— Scott Merkin (@scottmerkin) September 16, 2021