Jason Day says Zika concerns will keep him out of Rio Olympics

Jason Day is not going to the Olympics because of the Zika virus, costing golf its No. 1 player as it returns from a century-long absence at the games.The sport has lost two of its biggest stars in the last week. Rory McIlroy, a four-time major champion, also said Zika will keep him from competing in Rio de Janeiro.Day says his only reason for not going is concern over transmission of the mosquito-borne virus that has been linked to severe birth defects. The 28-year-old Australian says while the