Lydia Ko had just been handed a $1 million bonus for the second consecutive year, and the first thing she thought about buying with those newfound additional riches was a new phone. ''My mom doesn't like it,'' Ko said. The LPGA's rookie of the year from 2014 was the LPGA's player of the year in 2015, and in golf - or any major U.S. pro sport - there's never been anyone younger to end a season as the unquestioned best in his or her game. More...