Former NFL QB turned TV analyst Mark Sanchez was stabbed after he allegedly assaulted a worker who was dropping off cooking oil at an Indianapolis hotel in a bizarre attack authorities say “never should have happened.”

Prosecutors early Sunday released a probable cause affidavit that shined light on how the 38-year-old retired football star ended up stabbed — and then arrested.

It all unfolded shortly after 12:30 a.m. Saturday when officers arrived at Loughmiller”s Pub and Eatery in downtown Indianapolis. When they arrived, they discovered the 38-year-old Sanchez suffering from several stab wounds to the upper torso. In a nearby alley between two hotels, they found a 69-year-old man with a laceration to his left cheek.

Paramedics rushed Sanchez to the hospital and when detectives tried to obtain a statement from him he said “all he could remember was grabbing for a window,” cops wrote. He told investigators did not know who stabbed him or where it happened.

Detectives reviewed video from the incident which allegedly showed Sanchez running up to a large box truck. The victim was working for a company that specializes in commercial cooking oil and recycling, and was performing his assigned duties at the Westin.

According to the affidavit, Sanchez walked up to him and the two started talking. It appeared that the victim was then trying to get away from Sanchez, but the former first round pick allegedly started chasing the victim around the truck. Video allegedly shows Sanchez “grabbing and throwing” the victim toward a wall of the hotel. The two began to fight and Sanchez tossed the victim to the ground, the affidavit said.

In this photo taken Saturday, Aug. 24, 2013, New York Jets quarterback Mark Sanchez (6) scrambles from New York Giants’ Johnathan Hankins (74), and Mark Herzlich (58) before getting hit during the second half of a preseason NFL football game in East Rutherford N.J. (AP Photo/Julio Cortez).

Detectives spoke with the victim who gave a statement that matched the video, cops wrote. He said when Sanchez allegedly approached him and started talking, he leaned toward the ex-New York Jets QB because he was not wearing his hearing aids and could not hear him. He claimed Sanchez allegedly “smelled of alcohol and his speech was slurred.”

Sanchez told the victim he had “spoken to the manager of the hotel” who said the worker “could not be there,” the complaint stated. This allegedly confused the worker, who said he was going to call his manager. That’s when Sanchez allegedly entered the victim’s truck and kept repeating the claim that he couldn’t be there.

The victim knew at this time he “had a problem” and tried to grab his cell phone in the truck but Sanchez allegedly “blocked him from trying to call his manager.” The victim left his truck and tried to flag down a security officer at the Marriott, which is on the other side of the alley, before he walked on the passenger side of the truck. Sanchez again blocked the driver from going inside, cops alleged.

Sanchez “shoved” the victim who pulled out pepper spray and sprayed him in the face, per the complaint. It only stunned Sanchez for a brief moment who then attacked the victim again, cops said. The victim is identified as P.T. in the affidavit.

“P.T. thought ‘this guy is trying to kill me’ so he pulled his knife and when Mr. Sanchez came at him, P.T. went at Mr. Sanchez and struck him two or three times with the knife,” detectives wrote. “P.T. said he found himself flying back into the dumpster and falling onto the pallets on the ground.”

The victim said Sanchez continued his alleged assault and he “realized that he was in a life-or-death situation.”

He “somehow” made it to his feet when Sanchez allegedly came at him again and stabbed him one last time.

“The next thing P. T. knew was Mr. Sanchez looked at him with a look of shock, he slowly turned around, and Mr. Sanchez took off north bound in the alley.”

Cops later arrested Sanchez at the hospital. He stands accused of battery, unlawful entry to a motor vehicle and public intoxication. Sanchez was in town to call Sunday’s Indianapolis Colts game vs. the Las Vegas Raiders. He was reportedly last listed in stable condition and will be taken to jail once he’s released from the hospital.

“This incident should never have happened,” Marion County Prosecutor Ryan Mears said in a statement. “What began as a disagreement between a 38-year-old former professional athlete and a 69-year-old man should not have escalated into violence or left anyone seriously injured. As with any case, we will follow the facts and the law wherever they lead.”