Ex-Dallas Cowboys star Darren McFadden will be spending time behind bars ... TMZ Sports has learned the former running back just pled guilty in his drunken Whataburger case.
We broke the story ... back in January 2019, cops say McFadden was asleep at the wheel of his 2019 GMC Yukon in the drive-thru of a Whataburger in Texas.
Officials say after officers confronted him, McFaddenresisted ... and in the scuffle, Darren's driver's side and passenger windows were smashed in.
Authorities eventually hit McFadden with charges of resisting arrest and DWI with a BAC of greater than or equal to .