Courtney Williams came off the bench .
Courtney Williams scored 31 points and No. 6 seed South Florida held on late to defeat Colorado State 48 - 45 in an NCAA tournament first - round game Saturday night .
Courtney Williams came off the bench and scored 31 points and No. 6 seed South Florida held on late to defeat Colorado State 48 - 45 in an NCAA tournament first - round game Saturday night .