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Mark Sanchez was slapped with 3 charges for his alleged role in Saturday's violent altercation with a truck driver in Indiana that sent Sanchez to the hospital with multiple stabs, according to court documents.

Prosecutors charged Sanchez with battery resulting in injury, public intoxication and unlawful entry of a motor vehicle. We're told Sanchez is still being treated for his injuries at a hospital in Indianapolis, where it all went down.

According to court docs, obtained by TMZ, Sanchez approached the truck driver who was unloading fryer oil at a hotel loading dock. Surveillance footage appears to show Sanchez walking to the driver's door, opening it, and engaging in a conversation that lasted several minutes. The driver eventually walked toward the hotel's security but Sanch

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