Arizona Diamondbacks reliever Junior Guerra has returned to the team after missing the start of summer camp because of a positive coronavirus test.
Guerra is one of four Arizona players to test positive and had not participated in summer camp since its start last week.
Guerra said his first test for the virus was negative, but his second about 10 days ago was positive. He returned after testing negative twice in 24 hours.
Guerra signed with the Diamondbacks last offseason after spending the previous four seasons in Milwaukee.