AUBURN, Ala. (AP) _ Eli Manning and Mississippi couldn't pull off a miracle comeback, but they did put a scare into Auburn. Casinious Moore rushed for the first three touchdowns of his career and Auburn survived a Manning-led rally in his Southeastern Conference starting debut for a 27-21 victory on Saturday. The Tigers (2-0, 1-0 SEC) took a 27-0 lead in the third quarter before Manning led three touchdown drives of 80-plus yards in the final 18 minutes. Auburn coach Tommy Tuberville was still trying to sort out what happened to his team after it dominated much of the game. ``I still don't know why the game was so close,'' said Tuberville, who coached the Rebels from 1995-98. ``I thought we did almost everything right. ``When you're dominating a game 27-0, it is frustrating letting them come back. We let them back in the game and couldn't get a break for anything.'' He has Manning to thank for much of that. The sophomore marched the Rebels (1-1, 0-1) 80 yards on 14 plays as Charles Stackhouse ran up the middle for a 5-yard score with 4:41 left to make it 27-21. The Rebels converted two third-and-long plays and made a pair of fourth downs on defensive penalties to keep the drive alive. Ole Miss had only one timeout left, and Auburn managed to whittle most of the clock down with a first down and five running plays. The Rebels' hopes died with a running-into-the-punter penalty to give the Tigers another first down. ``I knew they had a stand-up kicker (Damon Duval), and I didn't want to be pinned back in our end zone,'' Ole Miss coach David Cutcliffe said. ``I think we should have blocked it.'' Manning had a second straight impressive performance. He was 24-of-39 for 265 yards with an interception and a TD despite being held to 39 yards passing in the first half. His starting debut was a five-TD, 20-of-23 gem against Murray State, but this time he did it against a defense considered one of the conference's best. ``We just couldn't get things going in the first half and couldn't get in a rhythm,'' Manning said. ``With some young people going out there playing and the first time being in an SEC game and seeing things full speed, it just took some time to get used to it.''