Police said the incident began with a fender bender at Gate C.
"At some point, three guys from another car jump out, grab the victim, throw him to the ground, hold him down while he's kicked and beaten by the first suspect," LAPD Cmdr. Andrew Smith said.
The four suspects were questioned and booked for assault with a deadly weapon - the weapons being their hands and feet. They were identified as Arthur Morales, 30, of Monrovia; Alan Trujillo, 29, of Los Angeles; Ulises Briceno, 26, of Los Angeles; and Alejandro Briceno, 29, of La Crescenta.
The victim was taken to Los Angeles County-USC Medical Center, where he was treated for injuries to his face and head. He has since been released. A pregnant woman who was with him was also taken to the hospital for precautionary reasons.
The assault happened after the stadium cleared out after the Dodgers' 6-5 win over the St. Louis Cardinals.
The Dodgers released a statement saying the fast work of stadium security and the LAPD shows that the team is taking security seriously.
"Our officers were there almost immediately," Smith said. "We had a uniformed officer that was driving by. He was flagged down by somebody saying there's a fight going on. He rushed over there joined by other LAPD officers and they stopped it and took everybody into custody."
Last year, San Francisco Giants fan Bryan Stow was severely beaten at Dodger Stadium on opening day, leaving him brain damaged. Stow has endured several surgeries and is still recuperating.
Authorities increased security following the incident in hopes of preventing other attacks. But some fans say security at the stadium doesn't appear to be getting better.
"They need to do something about it. I mean, it gets a little scary," said Landon Vivian of Hollywood. "I go to Dodgers games every now and then, and it gets rough."
In a statement posted on the Dodgers' website, officials said a quick security response prevented the incident from becoming more severe.
"We have made it clear that we are fully committed to providing a safe, family-friendly environment for all of our fans, and the very quick and effective response by our personnel and the LAPD officers on the scene shows that they were properly deployed and fully engaged in this effort," said Dodgers President Stan Kasten in a statement posted on the team's website.