Manley attended Duke University, where he played college soccer for four years between 2014 and 2017, making 58 appearances, scoring 1 goal and tallying 12 assists.[2]
On January 19, 2018, Manley was drafted in the first round (23rd overall) of the 2018 MLS SuperDraft, by Minnesota United FC.[4] He signed with the club on February 20, 2018.[5]
Manley made his professional debut on March 24, 2018, starting in a 3–0 loss to the New York Red Bulls.[6]
In July 2018, Manley was loaned out to Las Vegas Lights in the USL.[7][8] He made his league debut for the club on August 15, 2018, coming on as a 79th-minute substitute for Matt Thomas in a 3–1 away defeat to Orange County SC.[9]
In April 2019, Manley was loaned out once again, this time to Minnesota's USL affiliate club Forward Madison FC.[10] he made his league debut for the club on April 6, 2019, playing all ninety minutes in a 1–0 away defeat to Chattanooga Red Wolves.[11]
Manley was released by Minnesota at the end of their 2019 season.[12]