The 48-year-old, who won two World Series titles with the Boston Red Sox, signed a one-year deal with the Australian team in August and was in line to make his debut against Melbourne Aces at Blacktown International Sportspark on Thursday. "Manny Ramirez will be unavailable to play, and will be unavailable for selection to play for the Blue Sox until further notice," the team said in a statement https://sydneybluesox.com.au/news/official-statement. "With Manny's express consent, we advise that his unavailability is due to ongoing sensitive and confidential medical reasons."