Boston infielder Yairo Muñoz has become the latest Red Sox player to test positive for COVID-19 as the virus surge impacting the team remains unrelenting.

Eight Boston players and two coaches have either had a positive test or have been identified as close contacts since Friday.

"It's gut-wrenching," Red Sox chief baseball officer Chaim Bloom on Wednesday.

Bloom said the majority of the players who've tested positive have been vaccinated.

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Star shortstop Xander Bogaerts was pulled in the second inning of Tuesday night’s 8-5 loss to the Rays because of a positive test. It was announced before the game that reliever Hirokazu Sawamura had tested positive.

Red Sox left-hander Martín Pérez and right-hander Matt Barnes were added to the COVID-19 injured list on Monday. Also, reliever Josh Taylor and first base coach Tom Goodwin were identified as close contacts and quality control coach Ramón Vázquez tested positive.

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Infielders Kiké Hernández and Christian Arroyo were placed on COVID-19 IL last Friday.

The Red Sox began Wednesday with a one-game lead over Oakland for the second AL wild card.