WNBA's Brittney Griner -- Wins 'Mugshot of the Day' ... On Sheriff's Website

WNBA superstar Brittney Griner won ANOTHER big award Thursday ... "Mugshot of the Day" ... a title bestowed upon her by the people at the Maricopa County Sheriff's Office.

As we previously reported, Griner and her fiancee Glory Johnson were each arrested on Wednesday for domestic violence after an argument at their Arizona home turned violent.

The M.C.S.O. posted their mugshots on their official website -- as it does with EVERY mugshot -- where they ask users to vote for their favorite mugshot of the day.

On Thursday, Brittney won by a landslide.