Auburn quarterback Jackson Arnold produced three touchdowns, Jeremiah Cobb rushed for over 100 yards and scored, and the No. 24 Tigers earned a 31-15 homecoming win over the South Alabama Jaguars on Saturday afternoon in Auburn, Ala.Arnold rushed for 50 yards on 10 attempts and scored twice in the first half. He completed 13 of 24 passes for 142 yards and a score. Cobb carried 19 times for 119 yards to eclipse the century mark for the second straight week.The Tigers (3-0), which entered tied atop the SEC in rushing touchdowns with seven, added to their total with three more and will look ahead to their conference opener next week at No. 13 Oklahoma, where Arnold transferred from.Cam Coleman caught a TD pass, and Keyron Crawford recorded an interception that set up a touchdown.For the Jaguars (1-2), Bishop Davenport completed 18 of 26 passes for 170 yards and two TDs, one to Jeremy Scott and the other to Devin Voisin.Nearly a four-touchdown favorite over the Sun Belt Conference visitors, Auburn converted on fourth down at midfield early on. One play later, Arnold found Coleman on a deep ball for a 32-yard score at 9:09.The Jaguars answered with a 12-play, 64-yard drive that ended with Hamilton DiBoyan’s 29-yard kick.