Isaac McKneely scored 23 points, and Louisville hung on to beat South Florida 83-79 on Thursday to win its first NCAA Tournament game since Rick Pitino’s final season as coach. Ryan Conwell scored 11 of his 18 points in the second half and backup forward Sananda Fru had 10 points and 10 rebounds for the Cardinals. Louisville (24-10) showed signs of struggling without starting point guard Mikel Brown Jr., who missed his fifth straight game with back issues.