On February 21, 2014, junior Brunson scored 57 points in a double overtime victory over Lake Forest High School. The performance gave him both the school single-game and career scoring records. On March 21, Brunson set the IHSA playoff single game scoring record against the Jahlil Okafor–led Whitney Young High School by scoring 56 points in a 75–68 state playoff semifinal loss. In the game, still images of a movement by Brunson appeared to be an obscene gesture, but video of the gesture were deemed to be inconclusive and an initial suspension for the subsequent consolation game was overturned. Brunson averaged 26. 1 points, 5. 4 rebounds, 4. 7 assists and 2. 9 steals for a Stevenson team that finished the season with a 32–2 record. Two members of his high school team were National Football League athletes' offspring: Matt Morrissey and Cameron Green. Brunson was named Gatorade Player of the Year for the state of Illinois as a junior. Following the season, Associated Press named him as the only non-senior on the Class 4A All-state first team that also included Okafor, Cliff Alexander, Tyler Ulis and Sean O'Mara. He finished fourth in the 2014 Illinois Mr. Basketball voting. In April 2014, Illinois, Purdue, Kansas and Villanova had in-home visits. On May 3, 2014, he announced the eight schools that he was considering playing college basketball for: UConn, Michigan State, Illinois, Kansas, Purdue, Villanova, Michigan and Temple. That summer he was the number one rated point guard according to ESPN, although the class had a notable shortage of elite pure point guards. On June 25—the day after Jalen won a gold medal at the 2014 FIBA Americas Under-18 Championship—Rick Brunson received an offer as an on-bench assistant coach from Temple. The Temple offer fell through when Rick Brunson was arrested on various charges on July 25, and Temple fell out of the running for Jalen's services. Brunson participated in the July 9–11 LeBron James Skills Academy. On August 5, he announced official visits to Illinois on August 29–31, Villanova on September 4–6 and then Temple from September 11–13 and on August 9, he announced official visits to Michigan State from September 19–21 and Purdue on September 26–28.