Offensive lineman Nathan Smith announced his commitment to USC on Wednesday.
"Thank you to everybody that has recruited me so far. I have committed to USC! #FightOn," the 2016 recruit from Murrieta Mesa High wrote on Twitter.
USC made its scholarship offer to Smith, 6-foot-7 and 260 pounds, the previous Wednesday. He made an unofficial visit to campus Friday.
Smith is the fourth player to commit to the 2016 class, joining tight end Isaac Garcia and linebackers Daelin Hayes and Mique Juarez.