The Los Angeles Police Department did not release any details.
"The investigation continues. We are making good progress. As details become available, we will make them public," the LAPD said in a statement.
A law-enforcement source confirmed to Eyewitness News that a male and a female suspect were arrested.
Stow, a 42-year-old paramedic from San Francisco, attended the opening day game between the SF Giants and the Dodgers at Dodger Stadium. He was attacked in the parking lot after the game by two suspects and beaten into a coma. He remains hospitalized in serious condition with probable brain damage.
Police had been seeking a second suspect in the beating as well as a female witnessed driving the two beating suspects away from the scene. The female driver was described by witnesses as wearing a white Andre Ethier Dodgers jersey.
Composite sketches were released shortly after the beating based on eyewitness descriptions.
An official, who spoke on condition of anonymity because the investigation was ongoing, told the Associated Press that if the Los Angeles County District Attorney's office files a case against the men, the man previously identified as the suspect, Giovanni Ramirez, would be exonerated.
Ramirez's attorney says he knew from the start police had the wrong guy.
"I think the most important lesson to be learned in this case, we do in fact live in a society where you're presumed innocent until proven guilty, that wasn't the case here," said attorney Jose Romero. "Everyone from the chief of police to the mayor's office and in-between jumped on the band wagon and started pointing fingers at Giovanni Ramirez."
Another Ramirez attorney told Eyewitness News that the arrest was a good faith mistake.
"I'm not here to criticize the LAPD," said attorney Tony Brooklier. "It is a tough business, we make mistakes, both sides make mistakes. That's why we have courts of law."
Thursday night Mayor Antonio Villaraigosa defended his department.
"The person that was arrested was arrested because for one, he had a warrant, and two because during the course of the investigation there was some cause to believe that he was connected to the crime," said Villaraigosa. "It may be that that is not the case."
Ramirez has not been charged in the beating. Investigators have not produced sufficient evidence to charge him.
A gun was found in a laundry basket in the home where Ramirez was arrested on May 22. He has been at Men's Central Jail since his arrest. Ramirez was found guilty of a parole violation for the gun and was sentenced to serve time for the violation.
Authorities are still looking for a third suspect directly involved in the beating of Stow.
The Los Angeles County Board of Supervisors added to a reward fund for information leading to the arrest and conviction of the suspects on Tuesday. The total reward offered is $225,000.
Anyone with information regarding the attack on Stow is urged to contact the following:
- During non-business hours or on weekends, calls should be directed to 1-877-LAPD-24-7.
- Anyone wishing to remain anonymous can call Crime Stoppers at 1-800-222-TIPS (800-222-8477). Tipsters may also contact Crime Stoppers by texting to phone number 274637 (C-R-I-M-E-S on most keypads) with a cell phone. All text messages should begin with the letters "LAPD."
- Tipsters may also go to LAPDOnline.org, click on "webtips" and follow the prompts.
- You can also send email directly to BryanStowAttemptMurder@gmail.com.
The Associated Press contributed to this report.