Former NFL quarterback and current Fox Sports color commentator Mark Sanchez, who was arrested for multiple misdemeanors following a physical altercation this weekend, is now facing a felony charge of battery involving serious bodily injury, prosecutors in Indianapolis announced.

The more serious charge was added after investigators learned of the seriousness of the victim's injuries, Marion County Prosecutor Ryan Mears said at a news conference on Monday.

“This was a situation that did not need to occur,” Mears said. "The allegations involve a 38-year-old man becoming involved in an altercation with a 69-year-old man who sustained significant and very serious injuries.”

Other charges are possible, Mears said, noting this is still "the early stages of this investigation."

Early Saturday morning, Sanchez allegedly approached a 69-year-old truck driver in a hotel loading dock and "escalated a dispute about the victim’s parked vehicle," according to police and prosecutors. Sanchez allegedly climbed into the truck and kept the driver from calling for help before a fight broke out, according to court records.

"After the altercation turned physical, it is alleged that pepper spray was dispensed, and Sanchez suffered injuries consistent with being stabbed," prosecutors said.

Sanchez was arrested at the hospital and initially charged with three misdemeanors: battery with injury, unlawful entry of a motor vehicle and public intoxication, police said. He posted a $300 cash bond on Sunday and is due in court on Tuesday. 

Sanchez was in Indianapolis as part of the broadcasting crew for Sunday's game between the Las Vegas Raiders and the Indianapolis Colts. He did not end up calling the game.

This is a developing story. Please check back for updates.