Koroma was signed by the Kansas City Chiefs as an undrafted free agent on May 7, 2018.

Koroma was selected by the Houston Roughnecks in the 2020 XFL Supplemental Draft on November 22, 2019.

[3] On March 10, 2022, Koroma was drafted by the Michigan Panthers of the United States Football League.

[4] The Seattle Sea Dragons selected Koroma in the seventh round of the 2023 XFL Supplemental Draft on January 1, 2023.

[5] The Sea Dragons folded when the XFL and USFL merged to create the United Football League (UFL).