"I'm picking the University of Tennessee and I picked them because my mom and I both felt it was the best basketball move for me and my future," Walker said.
Walker, a 6-foot-8, 215-pound big man, took an official visit to Tennessee at the beginning of January. Walker also considered Georgia and St. John's.
"I felt the program is moving in a great direction," Walker said. "Rick Barnes is a great coach and Rob Lanier did a great job of recruiting me, but also as a young team they showed accountability amongst themselves."
A three-star prospect, Walker brings physical play to the power forward spot. He said he plans to bring effort and energy to the Volunteers.
"I bring toughness, attitude and high-motor," Walker said. "I'm an energy guy who can finish around the rim with both hands. I can also defend and rebound."
Walker joins three-star post player Zach Kent to make up Tennessee's current 2017 recruiting class.