Southside rushed for 691 yards and mounted a late defensive stop to hold off 16th-seeded Slidell, 56-54, for a wild Division I nonselect first-round victory at L.V. McGinty Sr. Stadium on Nov. 13.
Senior RB Justin Williams ran for 391 yards and three touchdowns as the 17th-seeded Sharks advanced to face top-seeded and unbeaten Mandeville in the second round on Nov. 20.
The first half was a flurry of scoring, with Slidell taking a 41-34 lead into the intermission, but Southside (6-5) came out swinging in the third quarter…