Moments before beginning his 20-day jail sentence for DUI this morning, former NBA star Jalen Rose posed for a brand new mug shot ... obtained by TMZ.
Rose checked into Oakland County jail outside Detroit at 8AM to kick off his sentence -- which his lawyer called "outrageous."
As TMZ first reported, Rose was arrested for DUI back in March -- after crashing his car into a ditch.
Jalen Rose's New Mug Shot
TIPPING OFF 20 DAYS IN JAIL
8/2/2011 5:10 PM PDT BY TMZ STAFF
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