LSU and Louisiana Tech was a three-point game in the fourth quarter, but the Fighting Tigers scored the final two touchdowns for a 38-21 win over the Bulldogs.
The win moves LSU's record to 4-0, while the Dogs fell to 2-1.
Tech was down 24-0, but Quarterback J'Mar Smith threw three touchdown passes to cut the deficit to three.
"It's a 60-minute game, we started off slow, we went into halftime knowing we had to make some changes and we found out what we needed to do to compete at the highest level," said Smith.
Smith threw for 330 yards and completed some big passes on third down. La Tech was 9-of-18 on third downs. LSU linebacker Devin White says that will be a point of emphasis at practice this week.
"Wednesdays are third down days at practice, we don't want them nowhere near 50%, but we are going to fix it, we got a lot of defense that we got, we feel like those coverages were not the best for us, we'll run something different week. We are going to be better next week, I can promise you that."
LSU had 409 yards of total offense. Quarterback Joe Burrow was 16 of 28 for 191 yards. The running game was effective for most of the contest. Nick Brossette rushed for 78 yards and three touchdowns, while Clyde Edwards-Helaire had a career-high 136 yards and two touchdowns.
LSU will now get to host Ole Miss, which doesn't have a great defense. Louisiana Tech begins Conference USA play next week at North Texas.