ARLINGTON, Texas - Justin Turner violated coronavirus protocols when he celebrated with his Los Angeles Dodgers teammates and he refused instructions from security to leave the field, behaviour that Major League Baseball said risked the safety of others.

The commissioner's office said Wednesday it is starting a full investigation of the 35-year-old third baseman.

The Dodgers won their first World Series championship since 1988 with a 3-1 victory over Tampa Bay in Game 6 on Tuesday night at Globe Life Field.

Turner was pulled from the game following the seventh inning after MLB was notified that he had tested positive for COVID-19. He was quarantined in a doctor's office off to the side, Dodgers president of baseball operations Andrew Friedman said.

Turner later returned to the field with a mask to celebrate the Dodgers' title. He then took down his mask and posed for a team photo on the field.

“Immediately upon receiving notice from the laboratory of a positive test, protocols were triggered, leading to the removal of Justin Turner from last night's game,” MLB said in a statement Wednesday. “Turner was placed into isolation for the safety of those around him. However, following the Dodgers' victory, it is clear that Turner chose to disregard the agreed-upon joint protocols and the instructions he was given regarding the safety and protection of others.

“While a desire to celebrate is understandable, Turner's decision to leave isolation and enter the field was wrong and put everyone he came in contact with at risk. When MLB Security raised the matter of being on the field with Turner, he emphatically refused to comply.”

Turner became a free agent when his $64 million, four-year contract expired following the victory.

Turner's agent, Greg Genske, did not immediately respond to a text from The Associated Press seeking comment.

“Last night, nasal swabs were conducted on the Dodgers' travelling party,” MLB said. “Both the Rays and Dodgers were tested again today and their travel back to their home cities will be determined after being approved by the appropriate authorities.”

Both teams were travelling home from the Dallas area on Wednesday in co-ordination with their local health authorities, a person familiar with the arrangements said, speaking on condition of anonymity because no announcement was made.

No additional players received positive results from rapid PCR tests early Wednesday, the person said, but the wife of one Rays player tested positive, the person said. The wife and the player did not travel with the team and were to travel on their own, the person said.

A private plane was being arranged for Turner's travel, the person said.

The commissioner's office said it will consult with the players' association as part of its investigation. The union was in the process of gathering facts on the events.

Turner hit .307 with four homers and 23 RBIs in the pandemic-shortened season and .293 (17 for 58) with three homers and six RBIs in the post-season, including .320 with a pair of solo homers in the World Series.

“Having a mask on and staying socially distanced, he wanted to come out and take a picture with the trophy, which can't state strongly enough how big of a role he's played in the success of this organization,” Friedman said.

“But I think for him, just being a free agent, not knowing exactly how the future is going to play out, I don't think there was anyone that was going to stop him from going out,” he said. “I think from at least my perspective and not watching it super closely with everything going on, but I think he was mindful of other people, especially other people that he hadn't already been in contact with. This is something that we're going to wrap our arms around tonight and in the morning and figure out where we're going from here.”

Turner, however, was visible on the field without a mask during the celebration. And Dodgers manager Dave Roberts was nearby, also not wearing a mask.

“I haven't seen the pictures,” Friedman said. “If there are people around them without masks, that's not good optics at all. I haven't seen them, so it's hard for me to speak to it specifically.”

“But I think from our standpoint, I think the people who were around him were people that would be in the contact tracing web, anyway, with just how closely a lot of us have been around each other,” he said. “And so now I think the subsequent tests we're going to take are really important to figure out what we do and to make sure that any of us that are potentially positive do not spread it to other people.”

Turner has served as a player representative on the union executive board and spoke about the protocols on Sept. 29, a day ahead of the Dodgers' post-season opener.

“Obviously there's a lot of protocols and things that we're allowed to do and not allowed to do in getting tested every day, and I would say it's been a pretty successful season getting to this point and getting to the playoffs,” he said then.

“I was probably in that category where I was optimistic that we were going to have a season, but there was definitely some doubt whether or not it was going to happen. So to be sitting here today watching playoff baseball as the American League kind of kicks off their wild-card round, I would say that we did a good job and I commend everyone for taking it serious and being responsible and making good choices and allowing us to get to this point.”

He addressed the success of reaching the World Series despite the pandemic on Oct. 19, a day before Game 1.

“I think it's ultimately a testament to the players for being responsible and making good choices and doing everything that we had to do to ensure that the season was able to go on,” he said. “So I tip my cap to every player who put the uniform on and took that risk of playing and was responsible about it and did it the right way and enabled us to have a full season and now be able to participate in a World Series.”