The team started the 2017–18 season by winning the AMJ Campbell Shorty Jenkins Classic, a WCT event. At the 2017 United States Olympic Curling Trials, they missed their chance to play in the 2018 Winter Olympics when they lost a close three game final series to Nina Roth's team. Later that season they defended their national title, winning the 2018 United States Women's Curling Championship. Representing the United States at the 2018 World Women's Championship, they finished fourth, losing the bronze medal game to Russia's Victoria Moiseeva. Persinger and Team Sinclair made history at the 2018 Players' Championship when they became the first American team to win a Grand Slam event. They finished the season with another quarterfinal finish at the 2018 Humpty's Champions Cup.