Mi si sippi State quarterback Dak Prescott led arguably the biggest win of Dan Mullen's six seasons coaching the Bulldogs, a 34-29 Walter Payton Jersey road win at LSU that flipped the typical power structure of the SEC West on its ear Saturday.Prescott completed 15 of 24 pa ses for 268 yards, a pair of touchdowns and no interceptions, and was just as effective on the ground: 22 carries, 105 yards and another touchdown. Prescott dealt the game-clinching blow with a 74-yard touchdown pa s to Jameon Lewis early in the third quarter, extending a 31-10 lead for MSU.Earlier in the week, Prescott said the Bulldogs' offense was determined to get Lewis, a senior, . He delivered in that regard, as well, getting Lewis five catches for 116 yards. Prescott has now rushed for 100-plus yards in three consecutive games, and has thrown for 200 or more in all four Bulldogs games this season.Another key factor in the upset was Bulldogs running back , who annihilated the LSU defense with 197 yards on 16 carries and a touchdown.LSU made a furious charge with a three-touchdown fourth quarter, but it wasn't enough.The Tigers' rushing attack mounted just 89 yards on 35 carries as a Mi si sippi State defensive line that has been dominant all season took control of the line of scrimmage. MSU recorded six tackles for lo s, including two by Preston Smith.*Follow Chase Goodbread on Twitter * Anthony Miller Jersey