Sage Northcutt was destroyed way more than anyone thought after a 29 second, first round knockout in his ONE Championship debut -- turns out he suffered 8 fractures and was in surgery for 9 hours to repair the damage.
Northcutt posted an horrific pic of the aftermath ... hooked up to all sorts of stuff post op in the hospital.
Sage's debut was a disaster ... the 23-year old took a devastating punch at the hands of Cosmo Alexandre to the face, sending him to the canvas with a thunderous face plant. Clearly the punch did damage, but the face plant may have exacerbated things.