Buster Olney reports on the Yankees' Anthony Rizzo being placed on the COVID-19 IL, after he tested positive. (0:32).Manager Aaron Boone announced Sunday that Anthony Rizzo, the New York Yankees' first baseman, has been tested positive for COVID-19.Boone stated that Rizzo, who turned 32 Sunday, was experiencing some symptoms, but is "doing all right." Rizzo was added to the COVID-19-related injured list.After Saturday's game, Rizzo was positive for HIV. He went 0-for-4 against the Yankees in their 5-4 win over Seattle Mariners.Rizzo is the latest Yankees player to test positive for the virus, joining Gary Sanchez as catcher and Jordan Montgomery as starting pitchers Gerrit Collie and Jordan Montgomery.Cole was positive on Monday, Montgomery positive Tuesday, and Sanchez placed on the COVID-19 List Thursday. Boone stated that Sanchez, Montgomery, and Cole are feeling better.According to MLB protocols, players who are positive for COVID-19 will be kept off the field for at least 10 days before being allowed to return.After the Yankees had returned from six games against the Tampa Bay Rays, Miami Marlins, and Miami Marlins in Florida where COVID-19 is on the rise, the outbreak took place. Rizzo made his debut for the Yankees in July 30th at Miami.Boone stated that he believed that a lot of the people who were affected by this wave of them came from Florida. "It's a little bit of everything you don't know where and when it's spreading."New York's players have at least 85% coverage. However, the Yankees are still being hit hard. Boone stated that the team will be having discussions about being more cautious during its six-game road trip.Luke Voit, first baseman, was activated from Sunday's injured list and will replace Rizzo in the lineup against the Seattle Mariners. Voit, who was sidelined due to left knee inflammation, is now batting.241 and has three homers as well as 11 RBIs. In the 2020 pandemic-shortened season, Voit led the majors by hitting 22 homers.Boone stated, "He feels great." "As you all know, he has felt great for about a month now and has been able get some at-bats. He's ready to go, and I think he's excited to be here.Rizzo was acquired by the Yankees by the Chicago Cubs prior to the deadline for trades. He is currently batting.281 and has three home runs, six RBIs, and nine games since his arrival in New York.Rizzo, who is a survivor of cancer, stated in June that he would like to see more data before making a decision about whether or not to be vaccinated against COVID-19. Boone didn't want to speculate about any player's vaccination status.Boone stated, "A large portion of us clearly are, but that's not what I'm going to get into anymore."Outfielder Aaron Judge, third baseman Gio Urichla, catcher Kyle Higashioka, and reliefrs Wandy Peralta, and Jonathan Loaisiga, all tested positive for COVID-19 after the All-Star break.This report was contributed by The Associated Press.