along with sailing, plattner is a keen golfer. he owns the fancourt golf estate, which has three gary player-designed championship courses, in addition to the cordevalle golf club in san martin, california. the links of fancourt staged the 2003 presidents cup matches between the usa and an international team, captained by gary player. plattner is an investor in san jose sports & entertainment enterprises, which owns the san jose sharks, and other related properties as well as managing the city owned sap center at san jose. in 2013, he bought out two of the partners in sjs&e, and began serving as the sharks' representative on the national hockey league's board of governors.