Oct 31, 2013

ROUSEY DESTROYED HER KNUCKLES on 'Expendables 3' Set

Rousey says while she was shooting EX3 in which she plays a gun-toting killing machine, the calluses on her knuckles went away, which made her hands softer and more vulnerable to ripping open. 

 
FYI - generally, fighters enjoy having calluses on their knuckles, because it toughens up their hands for contact.

Source: TMZ