Mississippi running back Jaylen Walton (6) pulls away from Mississippi State linebacker Beniquez Brown (42) after a pass reception during the first half of an NCAA college football game in Oxford, Miss. (Rogelio V. Solis/AP)OXFORD, Miss. – Breaking down No. 19 Mississippi’s 31-17 win Saturday against No. 4 Mississippi State.THE BIG PICTURE: Rivalries are a different animal – and Ole Miss’ win against Mississippi State is only one example of many of why all the clichés about tossing out the records are rooted in truth. Mississippi State entered the day ranked No. 4 in the College Football Playoff Top 25, needing a win to stay in the postseason picture (and, with an Alabama loss, a berth in the SEC championship game). Ole Miss had lost three of its past four games (three SEC games in a row) and the Rebels seemed beaten down after a 30-0 loss to Arkansas last week. But the Rebels grabbed the early lead, and then came up with the plays in the third and fourth quarters to dash their rivals’ hopes.BOX SCORE: Rebels 31, Bulldogs 17WHAT WE’LL BE TALKING ABOUT: Chaos Theory arrived in the form of the Egg Bowl. The Rebels’ victory scrambled the playoff picture. Barring further chaos this weekend – which isn’t something anyone should bet against – the Bulldogs (10-2, 6-2 SEC) would appear to have been eliminated. Whether the SEC West cannibalized itself or whether it was just what happens in a rivalry, Ole Miss’ victory also probably ends the SEC’s hopes of putting two teams into the Playoff.THE DECIDING PLAY: Ole Miss led 17-10 late in the third quarter, but after a slow first half, both offenses seemed to be catching on and Mississippi State had gained some momentum. Ole Miss (9-3, 5-3) started at its 9 after a punt. Jaylen Walton took a toss and started right. With no room, he cut back left. He cut inside of defensive back Tolando Cleveland. Next, cornerback Will Redmond had a clear shot, but Walton bounced off him, ricocheted to the outside – and was gone down the sidelines for a 91-yard touchdown and a 24-10 lead with 2:13 left in the third quarter.THE DECIDING DRIVE: Leading 24-17 with 9:45 left, Ole Miss took over at its 28. Running back Jordan Wilkins broke free for 41 yards. On the next play, he took a pitch from Bo Wallace, started left – and then threw deep to receiver Cody Core, who’d gotten a step on the defensive back. The 31-yard touchdown on the halfback pass pushed the lead back to two touchdowns.KEY STAT: Jordan Wilkins, a redshirt freshman from nearby Cordova, Tenn., had attempted only one other pass this season. It was incomplete. But the running back’s completion percentage is now 50 percent.