The San Francisco Giants postponed a news conference Tuesday to introduce Carlos Correa after a medical concern arose during the All-Star shortstop's physical, according to two people with direct knowledge of the situation. The people spoke to The Associated Press on condition of anonymity Tuesday because the Giants have not announced publicly any details regarding Correa's $350 million, 13-year agreement, not even that Tuesday's availability was to introduce the prized free agent. One person confirmed that Tuesday's conference to welcome Correa was put on hold because the sides were awaiting the results of testing.