Barker said he is still considering Penn State.
The award is given annually to the college football's most outstanding defensive player.
The Nittany Lions moved up five spots from their No. 13 ranking at the end of the 2023 season.
Warren's seven touchdowns were third-most in the nation last year.
"He is as driven and as committed as a young player I've ever been around."
Smith was previously committed to Manny Diaz and Duke.