Walker, a 6-foot-8 forward, originally committed to Duquesne, but with their coaching change opted out. Walker took a visit to Texas A&M on Wednesday afternoon.
"I chose A&M because I feel like I won't just be bettering myself on the court, but a degree from A&M speaks volumes in the real world," Walker told Scout.
"Coach [Billy] Kennedy and coach [Ulric] Maligi really believes I can help bring a national championship to College Station," he added.
Walker is the fifth commitment of the Texas A&M's 2017 class. He joins four-star recruits Savion Flagg and TJ Starks, as well as Jay Jay Chandler and Isaih Jasey to make up the Aggies recruiting class.