National signing day 2012: Leonard Williams picks USC
That's good news for the Trojans, who lost commit Pio Vatuvei to Washington.
Williams, 6-foot-5 and 265 pounds, could help a defensive line that lost three starters in end Nick Perry and tackles DeJohn Harris and Christian Tupou.
The Trojans are still awaiting word on a decision from another Floridian: receiver Nelson Agholor.
-- Gary Klein