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Les Miles is growing accustomed to preparing No. 1 LSU for an opponent with a fluctuating quarterback situation.
LSU has faced fill-in starters the past two weeks and each time came away with easy victories.
Now LSU's next opponent, No. 19 Auburn, also is looking at making a change under center when it visits Tiger Stadium on Saturday.
Auburn coach Gene Chizik does not plan to announce his starter until Tuesday. The two candidates are Barrett Trotter, who has been the starter so far, and Clint Moseley, who played the second half of Auburn's 17-6 victory against Florida last weekend.
Miles said his defense will have to be ready for both and must guard against the tendency to expect a less-experienced quarterback to pose less of a threat.
''We always anticipate the change opponents make is for the best,'' Miles said Monday. ''We expect (Auburn) to be organizing and developing for that. Clint Moseley came off the bench and threw the ball well. We have to prepare for both guys and see which way they go.''
Two games ago, Florida starting quarterback John Brantley was ruled out of the game against the Tigers with an ankle injury, but Gators coach Will Muschamp didn't identify his starting quarterback all week. LSU had to prepare for freshmen Jeff Driskel and Jacoby Brissett. Brissett wound up starting but LSU allowed him to complete only eight passes and intercepted him twice in a 41-11 victory.
Last Saturday, Tennessee was without starting quarterback Tyler Bray because of a thumb injury. This time, LSU was familiar with Bray's backup, having faced Matt Simms last season. Simms completed only six passes and was intercepted twice in LSU's 38-7 win.
However, if Auburn makes a change, it will be by choice, not because of injuries.
Trotter was lifted at halftime against Florida with his team leading 7-6. Trotter completed just two of eight passes for 33 yards in the first half. He had completed only six of 19 passes the previous week against Arkansas.
Moseley was 4 of 7 for 90 yards against the Gators. He had thrown only two passes in Auburn's previous six games. So if Moseley makes what would be his first career start against LSU, he would do so without much experience.
''When you're going to play the No. 1 team in the country, that's going to be a hard start for anybody, especially with how they play defensively,'' Chizik said. ''It's just another great SEC team we've got to play against. Whoever starts, it's going to be a challenge.''
If Auburn winds up using both quarterbacks, LSU will be familiar with that.
Miles has been using both Jarrett Lee and Jordan Jefferson at quarterback since Jefferson's suspension stemming from a bar fight was lifted a little more than three weeks ago.
So far, LSU has won all of its games easily, regardless of its own or any opponent's quarterback situation.
The 2011 LSU squad is the first in school history to win each of its first seven games by double digits, with its two closest victories coming by 13 points over Oregon and Mississippi State.
LSU also has shown an ability to overcome slow starts and wear down opponents, dominating Tennessee in the second half to pull away for a 31-point victory.
Still, Miles keeps looking for ways to warn his players against becoming complacent.
''We didn't start as fast as we can against Tennessee,'' Miles said. ''I don't think we were as crisp as we have been. We have improved and have continued to answer the call so far this season. But we're going to be challenged the rest of the way.''
