McNealy qualified for the 2014 U.S. Open at Pinehurst at the age of 18. During the 2014−15 golf season, McNealy shot a 61 in the final round of the Pac-12 Conference Championship tournament, tying the 18-hole Stanford record held by Tiger Woods and Cameron Wilson. In 2015, he won the Haskins Award, which is presented annually to the best collegiate male golfer in the United States, becoming the third Stanford University golfer to win the award since 1971 (the other two being Woods and Patrick Rodgers).