Jennings signed with the Miami football program in the Class of 2017 as a three-star linebacker from Sandalwood High School in Jacksonville, Florida. He was the 697th ranked player overall, the 48th ranked outside linebacker and the 91st ranked player in Florida.
Jennings will likely begin this season as the backup to All-American candidate Shaq Quarterman at middle linebacker. There is no guarantee how many snaps Jennings will see unless Quarterman gets hurt. He could be in line to become the starter at the mike linebacker for 2019 if Quarterman decides to leave for the NFL Draft after 2018.