H.S. Basketball Player Arrested Over Post-Game Sucker Punches, Charged W/ Felony

The high school basketball player who was seen on video sucker-punching his opponent in a post-game handshake line was arrested on Wednesday and charged with a felony, TMZ Sports has confirmed.

According to court documents, officials accused 17-year-old Carter Prenosil of knocking out his opponent after the Carlisle vs. Nevada hoops game on Tuesday night in Iowa.

In the docs, cops say Prenosil "threw an unwarranted punch" at a Nevada player in both the stomach and the face.

In a video of the altercation, you can see the attack was violent -- with the alleged victim appearing to be KO'ed on his feet.

According to the docs, the player suffered a concussion and a cut to his mouth that required four stitches.

Cops -- who were in attendance at the arena -- say they launched an investigation ... and ultimately arrested Prenosil on Wednesday. He was later charged with felony willful injury -- causing serious injury.

Prenosil is facing up to 10 years in prison if convicted on the charge. He's due in court for a hearing on the matter on Dec. 13.

We've reached out to Prenosil's father for comment, but so far, no word back yet.

As for Prenosil's school, Carlisle Community School District superintendent Bryce Amos told us in a statement Wednesday, "This is without question an unfortunate incident that is not representative of the school culture that exists in Carlisle Community School District."