"It's really just been a long time coming for this team. It's kind of emotional," linebacker Bo Calvert said. "There's been some tough times and to just push through that, I'm really proud of our guys."
The Bruins were 10-21 in Kelly's first three seasons, but have won their first two games to start a season for the first time since 2017.
Thompson-Robinson led the way. After struggling in last week's opener against Hawaii, the junior bounced back by completing 9 of 16 passes for 260 yards, three touchdowns and an interception. The Bruins' running backs averaged 7.3 yards per carry as junior Zach Charbonnet had his second straight 100-yard game with 117 yards on 11 carries and a TD. Brittain Brown added 78 yards on 14 carries, including a fourth-quarter touchdown.
"If we are running the ball well, we'll stick with what's right. But I think that if you look at the play-action passes today, those were huge for us," Kelly said. "I'm happy with the way Dorian played. I think that he's going to get better each week, and that is a positive for us."
One of those play-action passes led to big TD early in the second quarter as Thompson-Robinson connected with Dulcich for a 75-yard score to tie it at 7.
"In big games, big players step up. Even though I didn't have many opportunities, we had to maximize those that we got," Thompson-Robinson said.
Charbonnet's 12-yard run off right end with 9:49 remaining in the second quarter gave UCLA a 14-7 lead that it would not relinquish.
UCLA held LSU to 48 yards rushing and forced a key turnover in the third quarter when Caleb Johnson intercepted Max Johnson's pass and returned it 34 yards to the LSU 17. Three plays later, Thompson-Robinson connected with Chase Cota for a 14-yard TD to extend the Bruins' lead to 21-10.
Thompson-Robinson's 45-yard TD toss to Kyle Phillips extended the lead to 38-20 midway through the fourth quarter.
Johnson was 26 of 46 for 330 with three touchdowns and an interception. Kayshon Boutte finished with nine receptions for 148 yards, including all three scores.
"I think it's both. UCLA did a good job of just playing the run and being in the right spots, but we got to get it corrected as an offense, and that will be done," Johnson said.
It is the second straight year LSU has lost its opener. The Tigers had to leave campus last weekend due to Hurricane Ida and spent most of the week practicing in Houston before arriving in Los Angeles on Thursday.
"I felt good about this football team going in. But you look and we had like 50 yards rushing and they had 200-something yards rushing," coach Ed Orgeron said. "They were all over the quarterback. And they made some big plays and we gave up big plays on defense again, so those are things that are reoccurring. We got to get them fixed."
It is the first time in 13 years a Pac-12 team has defeated a ranked Southeastern Conference squad. Coincidentally, UCLA was the last to do it, when it beat Tennessee in 2008. The Bruins could be ranked for the first time since Sept. 10, 2017, when the AP Top 25 is released on Tuesday.
"You don't have to write down a ranking for these guys. They know they played really well tonight," Kelly said. "It's good to talk about for other people but not us."
PLAY OF THE GAME
After Boutte's 3-yard TD opened the scoring early in the second quarter, the Bruins quickly responded on the first play of the ensuing drive with Thompson-Robinson's 75-yard connection to Dulcich.
Thompson-Robinson rolled right and found an open Dulcich, who caught the ball at the UCLA 40. The junior tight end took an angle toward the sideline, juked Tigers' defensive back Major Burns at the LSU 37 and then eluded tackle attempts by Derek Stingley Jr. and Damone Clark near the end zone.
It is Dulcich's third touchdown of 52 yards or more in the past nine games dating back to last season.
Boutte used an official's position to his advantage for his second touchdown. The sophomore caught a pass over the middle, was able to elude Jay Shaw when he was incidentally blocked by the official and went 44 yards to get the Tigers within 21-17 in the third quarter.
LSU: The Tigers look as if their pass defense has still not improved. They have allowed 14 completions of 50 yards or more since the start of last season, which is the most in the Football Bowl Subdivision.
UCLA: The Bruins drew 68,123 to the Rose Bowl, which was more than double the 32,918 that showed up for last week's opener against Hawaii.
LSU: Hosts McNeese next Saturday in the second meeting between the two schools.
UCLA: Is off next week before it hosts Fresno State on Sept. 18 in its final non-conference game.
Kyle Philips jukes his way to TD in fourth for UCLA
Kyle Philips impresses with his footwork as UCLA upsets No. 16 LSU.