Revaz will battle for playing time with Chol Marial and Galin Smith.
He previously committed to LSU in December.
Penn announced he would play at LSU.
Williams is the top-rated quarterback in the class of 2021.
The forward's decision leaves the Terps' frontcourt depth thin.
DeGennaro is the Terps' second wideout in their 2020 class so far.