Chad Jones had his best outing since the College World Series.

The two-sport athlete had two interceptions on Saturday night, leading a dominant defensive performance by No. 9 LSU in a 31-3 victory over Louisiana-Lafayette.

Jones also was a relief pitcher on LSU's 2009 national champion baseball team, but if he's to play for his second national title in football, LSU's offense may need improvement.

The Tigers (3-0) were hampered by sloppiness as Jordan Jefferson again struggled to complete deep passes and instead threw his first interception of the season. The Tigers also failed to convert a fourth-and-1 on a handoff to Charles Scott, keeping the game perhaps closer than it should have been.

It may have been a troubling sign for Tigers fans with Southeastern Conference matchups on the road against Mississippi State and Georgia, followed by a home date with No. 1 Florida, looming in the next three weeks. It didn't affect the outcome of this game, however.

Jefferson's 165 yards passing and two touchdown tosses to Brandon LaFell were enough against the overmatched Ragin' Cajuns (2-1). Scott and Trindon Holliday also scored for LSU.

LSU went ahead 7-0 late in the first quarter on a quick sideline pass to LaFell, who easily juked the lone defensive back covering him for a 16 score.

Soon after, Jones intercepted Cajuns quarterback Chris Masson and returned it 38 yards to the Louisiana-Lafayette 23. That led to Holliday's 11-yard score on an option pitch from Jefferson. Holliday had to slip one tackle, then the so-called fastest player in college football _ also an NCAA national champion in the 100-meter sprint _ sped for the pylon to make it 14-0.

The Ragin' Cajuns responded with a 61-yard drive, setting up Tyler Albrecht's 40-yard field goal to make it 14-3.

LSU led 17-3 at halftime after Josh Jasper drilled a career-long 52-yard field goal as time expired.

The Tigers opened the second half by marching 58 yards in seven plays, concluding with LaFell's second TD reception, a 20-yarder from Jefferson, to make it 24-3.

The Cajuns, coming off a 17-15 win over Kansas State, had other chances to score against LSU, but the Tigers defense came up with big plays each time. ULL had first-and-goal from the 2 in the third quarter, but was stuffed on four straight runs up the middle. On fourth down, LSU's Harry Coleman stripped Undrea Sails and Perry Riley recovered on the 2.

When the Cajuns drove into LSU territory in the fourth quarter, Jones made his second interception.

LSU then drove for its final TD, a 1-yard completion from Jarrett Lee to Scott.

Masson was 16-of-36 for 159 yards. The Cajuns rushed for 109 yards, led by Sails' 48, by far his lowest rushing total of the season.

LSU rushed for 164 yards, led by Scott's 63. LSU's Terrance Toliver led all receivers with six catches for 68 yards. LaFell finished with three catches for 57 yards, his 21-yard reception being Jefferson's longest completion of the game.