Diabate played at Florida for three years before deciding to transfer to Utah for the 2022 season.[3][4] In his collegiate career he totaled 228 tackles, 24 going for a loss, 10.5 sacks, an interception, 2 pass deflections and 4 forced fumbles.[5] His best year came with Utah during the 2022 season, where he posted 58 tackles, 13.5 being for a loss, 5 sacks, a pass deflection, and 1 forced fumble.[6]
After not being selected in the 2023 NFL Draft, Diabate signed with the Cleveland Browns as an undrafted free agent on May 12, 2023.[10] On August 29, 2023, the Browns announced that he had made the initial 53-man roster.[11]
Diabate suffered a hip injury in Week 1 of the 2024 season and was placed on injured reserve on September 11, 2024.[12] He was activated on October 12.