TMZ Sports has obtained an image of Mark Sanchez being placed into an ambulance after Saturday’s stabbing incident in Indianapolis … showing him lying shirtless and wounded on a gurney as he received medical attention.

We’ve obtained video and pictures from the scene around 12:30 AM … showing a large police presence in the area.

In the footage, the alleged victim — a 69-year-old delivery driver — can be seen sitting upright with a towel covering his face … moving his arm to duck caution tape while the EMTs roll him toward an ambulance.

We broke the story — Sanchez and the alleged victim were rushed to a nearby hospital after sustaining serious injuries in the altercation. The delivery driver suffered a “severe laceration to the side of his face, penetrating all the way through his left cheek,” according to officials … and Sanchez had multiple stab wounds.

Sanchez is facing a handful of charges stemming from the incident — felony battery involving serious bodily injury and misdemeanor battery resulting in injury, public intoxication and unlawful entry of a motor vehicle — with the driver claiming the quarterback initiated the altercation due to a parking spot.

Both men were in bad shape following the incident … and on Monday morning, a trail of blood was still visible on the sidewalk.