At 14 years and 312 days, Pearson eclipsed the previous record set by Western Sydney Wanderers' Ischia Brooking, who debuted aged 14 years and 347 days in 2023 and also moved ahead of Matildas captain Sam Kerr, who debuted at the age of 15 in 2008.
Kerr held the record for nearly 15 years after making her A-League Women debut for Perth Glory aged 15 years and 45 days, until Talia Younis broke it in 2023 when she debuted for Western Sydney Wanderers aged 14 years and 361 days.
Pearson, born on December 24, 2010, joined five-times champions Sydney earlier this year. Underscoring the generational span of the competition, her debut came opposite Melissa Barbieri, the league's oldest player.
"I'm knackered at the moment but thank you to everybody who believed in me, who gave me the opportunity and I'm so thankful we got a point," Pearson said.
Head coach Ante Juric said Pearson shows great maturity for her age. "We have been very impressed with her progress in training, and tonight she showed she's more than capable of handling the occasion," he added.
Sydney, who are second in the league, face Adelaide United next on November 8.