Mobley developed into a star at St. Peter-Marian High School and averaged 28.2 points, 10.1 rebounds, and 7.3 assists per game as a senior.
He opted to spend a postgraduate year at Worcester Academy and developed into a good scorer after Rene Castro was injured.
[2] Mobley began his college career at Central Connecticut State and averaged 6.8 points per game in his freshman season.
He increased his scoring to 17.2 points per game as a sophomore and earned Second-team All-Northeast Conference honors.
Mobley had a season-high 34 points and set a St. Bonaventure record with nine 3-pointers in a loss to VCU on February 4, 2017.
[3] On January 31, 2018, Mobley scored a career-high 35 points and had 11 rebounds to lead St. Bonaventure to a victory over George Mason, 85–69.
On October 30, 2019, Mobley signed with Sigortam.net İTÜ BB of the Turkish Basketball League (BSL).
[19] On March 11, 2024, he signed with Wilki Morskie Szczecin of the Polish Basketball League (PLK).