Bo Jackson ran for four touchdowns and totaled 290 yards on 23 carries yesterday as No. 2 Auburn introduced its I-formation with a 49-7 rout of Southwestern Louisiana in Auburn, Ala.

Jackson, a 222-pound senior tailback, was a 1983 all-America but was injured half of last season. Today, he scored on runs of seven, 47 and 76 yards to put Auburn up, 21-0, in the first quarter. His 12-yard scoring run in the third quarter made it 42-0.

Teammate Brent Fullwood gained 173 yards, including a touchdown run of 70 yards.

"I had a feeling we would be pretty good offensively," Auburn Coach Pat Dye said. "One thing we did differently today is that we played the front line a little longer to see how long Bo could run."

"It's hard to compare Bo to anybody we've played against," said Southwestern Louisiana Coach Sam Robertson.

Auburn, switching to the I-formation in its season opener after four years of the wishbone, dominated the outmanned Ragin' Cajuns before about 60,000 fans on a hot, steamy day.

Along with Jackson's four scores, quarterback Pat Washington threw a five-yard touchdown pass to Kyle Collins. Bobby Walden threw a 15-yard scoring pass to Jeff Parks and Fullwood, the backup to Jackson at tailback, ran 70 yards for the final score.