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The entire three-game series between the Pittsburgh Pirates and St. Louis Cardinals that was set to begin Monday night at Busch Stadium was postponed Sunday while the Cardinals continue to deal with a COVID-19 outbreak.

There have now been 27 games postponed by Major League Baseball because of coronavirus concerns. The Cardinals have not played since July 29 against the Twins, having had 13 games postponed since then.

One reason for the complete series being postponed is the Cardinals have received word Sunday of an additional positive since the three new positives Friday, two sources with knowledge confirmed to the St. Louis Post-Dispatch. The team confirmed that outfielder Lane Thomas tested positive for COVID-19 from his Saturday test.

MLB said Sunday night that the league and the Cardinals "believe it is prudent to conduct additional testing while players and staff are quarantined before the team returns to play."

The Cardinals' weekend series at home against the Chicago Cubs was called off Friday after two more St. Louis players and a staff member tested positive for the coronavirus.

St. Louis has 46 days left on its schedule with 55 games to play. The Cardinals are scheduled for a doubleheader in Detroit on Thursday, but there's some question if the team should be asked to return from a two-week hiatus with limited workouts to immediately play a road doubleheader.

Plesac sent home

Pitcher Zach Plesac was sent back to Cleveland in a rental car after violating team rules and Major League Baseball's coronavirus protocols, a club official told the Associated Press.

The official said the 25-year-old went out with friends in Chicago on Saturday night following his six shutout innings to beat the White Sox.

Major League Baseball has been emphasizing the need for players to be more careful and follow its protocols. The episode with Plesac is the most high-profile evidence of baseball's increasing concern about its guidelines.

Last month, Plesac spoke of the importance of players abiding to the "code of conduct" every team was required to submit to MLB in hopes of the 60-game regular season taking place.

"There are common sense situations, where you see things are packed, or going out to the bars and drinking — doing stuff like that isn't stuff that's really important to us right now and shouldn't be important to us right now," Plesac said July 3.

Etc.

•Sunday's game between Baltimore and Washington was suspended with the visiting Orioles ahead 5-2 in the sixth inning, because the grounds crew had trouble unrolling the tarp when a shower arrived. The game will resume at Baltimore on Friday, when the teams already were supposed to be opening a series. The game was suspended, rather than called outright, because of the tarp issue.

• The Yankees placed slugger Giancarlo Stanton on the 10-day injured list because of a left hamstring strain.