2020: Stanley spent the 2020 USL Championship season with Portland Timbers 2, starting all 16 games and playing every minute of the season at left back. He recorded two assists, placing him second on the team in that category. His assists both came against Reno 1868 FC in defeats on July 29 and Sept. 20. Shortly after the conclusion of the 2020 campaign, Timbers 2 announced that the team would be going on hiatus for the 2021 season, allowing Stanley to leave the club.
College: Stanley spent two years competing in the collegiate ranks with perennial NCAA powerhouse Duke University. He made 37 appearances across his freshman and sophomore seasons, tallying three assists while earning All-ACC Academic Team honors in each season, as well as a spot on the All-ACC Freshman Team.
2018: Stanley played in 11 games for Saint Louis FC, making 10 starts. His side went 2-3-5 in the games that he started, including a 2-0 victory over Sporting KC II in Fenton, Missouri on June 2, 2018.
2017: Stanley made six appearances while on an Academy contract with Saint Louis FC, all starts, with STLFC going 1-3-2 in those games.
2016: Stanley signed an Academy contract with Saint Louis FC of the USL Championship in 2016 as a 16-year-old and made his professional debut in a 2-2 draw against OKC Energy FC on Sept. 24, 2016. That was his only appearance of the season.
Youth: Stanley was developed in the Saint Louis FC Academy and earned Central Conference Best XI honors four years in succession: U-15/16s Best XI in 2015 and 2016, U-17/18s Best XI in 2017 and U-18/19s Best XI in 2018. Stanley also earned United Soccer Coaches All-America honors in 2016 and 2017.
International: Stanley represented the U.S. extensively at the Under-18 level and was also called up to the U.S. U-20s for a number of training camps and matches in 2017 and 2018.