Louis Oosthuizen of South Africa won't be taking part in golf's return to the Olympics this year, the third major champion to withdraw in the last week as the deadline nears to confirm participation. Oosthuizen, who won the 2010 British Open at St. Andrews is No. 12 in the world, said Thursday he was pulling out because of family and scheduling issues. ''I have always represented South Africa with pride, so didn't make my decision without a great deal of thought,'' Oosthuizen said. More...