Ex-Formula One driver Antonio Pizzonia was arrested for assault over the weekend, TMZ Sports has learned.
Details surrounding what led up to the 45-year-old's trip to the slammer remain unclear ... but the Brazilian athlete was booked in a Texas jail around 6 PM on Saturday.
Pizzonia -- who raced in the world's top racing organization from 2003-2005 -- looked stoic as he posed for a mugshot ... which showed him decked out in a striped jail jumpsuit for the occasion.