Branden Grace of South Africa has become the fourth golfer to pull out of the Olympics because of the Zika virus.

Grace is a two-time winner this year and No. 11 in the world, the highest-ranked South African. He says he is withdrawing because of concerns over Zika. Grace is getting married in November and plans to start a family soon. He says he must put the health of his family ahead of golf.

His announcement comes two days after Rory McIlroy said Zika was behind his decision to withdraw.

That means the top three South Africans will not be in Rio de Janeiro when golf returns to the Olympics for the first time since 1904. Charl Schwartzel cited Zika, while Louis Oosthuizen cited family and scheduling issues.