South Carolina headed into its Week 3 contest against LSU as 6.5-point underdogs, according to ESPN BET. A complete performance, with some momentum from a rowdy crowd at Williams-Brice Stadium, is exactly what it needed to pull off an upset victory. After 20 minutes, it appeared that the Gamecocks were right on track to do so. Lengthy scoring drives, stops on defense and a big play on special teams helped the team develop an early 17-0 lead. LSU would eventually crawl back into the game, making the score close until the final whistle. And that close score would eventually reverse into the visi…