Yastrzemski will be placed on the COVID-19 injured list after testing positive for the virus Sunday, Evan Webeck of The San Jose Mercury News reports.
The 31-year-old is experiencing mild symptoms and will now head into quarantine for a minimum of five days and could be cleared if he delivers a negative PCR test on the fourth and fifth days. Luis Gonzalez, who was called up Friday and made his first start of the season Saturday, could have an expanded role in Yastrzemski's absence.