The tarp is on the Wrigley Field infield.
The Chicago Cubs and Arizona Diamondbacks will not be starting on time.
The game was supposed to start at 2:20 p.m. ET, 1:20 Central.
Instead, rain has kept the game from getting underway.
Sunday's forecast called for scattered showers and the occasional thunderstorm. Rain is expected into the early evening.
It's a tricky situation, because the Cubs and Diamondbacks aren't slated to play again this season.
They do both have off days on Monday. Arizona is slated to fly home and begin a homestand on Tuesday, while the Cubs play a two-game series at Wrigley beginning Tuesday against the Dodgers.
Delaying the game entirely until Monday would force Arizona to make its flight back to Phoenix 24 hours later than hoped.
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This is supposed to be the series finale to a matchup that began Friday with an absurd 13-11 Cubs win that featured 16 runs just in the eighth inning.
Chicago won the Saturday matchup, as well, thanks to back-to-back homers from Seiya Suzuki and Michael Busch.
The Wrigley Field scoreboard told fans in attendance that an update would come when it was available.
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