Giants are dealing with outbreak of COVID-19

First baseman Brandon Belt was among the latest Giants players to test positive for COVID-19 on Friday as a wave of cases sweeps through the clubhouse.

An outbreak that began Sunday with Mike Yastrzemski testing positive has grown to include at least four more players and one staff member after the latest round of results Friday. In addition to Belt, the latest players to test positive were reliever Dominic Leone and outfielder Steven Duggar, joining Yastrzemski and reliever Zack Littell on the COVID IL.

The outbreak has strained the roster and moved the organization to take measures to contain the spread, including limiting clubhouse access to “essential personnel” only and emphasizing mask-wearing indoors, which has not been common practice in the clubhouse this season, even after Yastrzemski’s initial positive test.

“We are taking this very seriously,” Giants manager Gabe Kapler said. “We’re encouraging the best practices and we are following Major League Baseball’s protocols … We’ve had discussions around encouraging mask wearing.”

President of baseball operations Farhan Zaidi sent out an all-staff email informing employees of the new restrictions and reminding them to mask up and report symptoms, as required under MLB rules whenever a club reports three or more cases.

ROCKIES’ BRYANT ON IL >> The Colorado Rockies placed struggling left fielder Kris Bryant on the 10-day injured list Friday because of back pain.

The move is retroactive to Tuesday, and Bryant won’t be eligible to return until May 6 at Arizona.

Bryant, who signed a $182 million, seven-year free-agent deal in March, is batting .281 with no homers and four RBIs.

An MRI Friday showed no structural issues.