He dislocated his left shoulder at the High School Nationals title game and underwent surgery.

[3] He originally committed to playing college basketball for Illinois but reopened his recruitment after coach John Groce was fired.

[6] On December 18, 2018, Tilmon recorded a sophomore season-high 23 points and 10 rebounds in a 71–56 win over Xavier.

Tilmon declared for the 2019 NBA draft before withdrawing his name and returning to college.

[14] On October 28, he joined the Lakeland Magic as an affiliate player[15] and in 45 games, he averaged 9.7 points, 5.1 rebounds and 1.6 assists in 20.5 minutes.

[23] On April 1, 2024, Tilmon signed with the Al Qadsia of the Kuwaiti Division I Basketball League.

[25] On June 28, 2024, Tilmon signed with the Suwon KT Sonicboom of the Korean Basketball League.