The three-star committed to the Bruins over a final group that included Boston College and Oregon.
He also had offers from Arizona, Arizona State, Boise State, Cal, Vanderbilt, Washington, Washington State and Wisconsin among others.
The Semper Fidelis All-American is the No. 3 ranked offensive guard in the West in the 2016 class and No. 2 in California.
Check out senior highlights of Alves.