The stabbing happened on Wednesday morning in the 100 block of McCullough Avenue.
Authorities said the information is preliminary, but a man and a woman were arguing when a person who was unaffiliated with them got in the middle.
“I don’t know if it was a good Samaritan deal,” said Sergeant Valdez, who was on the scene.
The suspect could face an Aggravated Assault with a Deadly Weapon charge. It’s unknown where the victim was stabbed and if he is in stable or critical condition.