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Zac Stacy New Mug Shot ... Jail Sentence Begins

Former NFL running back Zac Stacy took a new mug shot on Monday ... before he was officially put behind bars for six months for attacking his ex-girlfriend in 2021.

Stacy posed for the photo at the Orange County Jail in Florida after he was remanded into custody following a judge's ruling at a sentencing hearing on Monday.

In the new picture, obtained by TMZ Sports, Stacy, wearing a striped shirt with a black collar, looked stoic -- and perhaps even a bit emotional.

Stacy was ordered to serve the jail time -- as well as one year of probation -- after he cut deals with prosecutors earlier this month following allegations he was violent with Kristin Evans, the mother of his child, on multiple occasions in '21.

Despite the attacks, though, Evans said Tuesday in a social media post she had hoped Stacy would not serve any jail time.

Instagram / @kris__evans

"Please give me some grace in understanding that I’m not being easy on Zac," she said, "rather I am trying to protect our son from anymore trauma."

Zac's tentative release date has been set for July 25.

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