Brian Kelly was as demonstrative as you’ll ever see a coach following LSU’s 27-20 loss to USC in Las Vegas on Sunday.

In the postgame press conference, Kelly told reporters he was angry with his football team for the first time in his 3-year tenure. At one point, he pounded the dais in frustration and raised his voice talking about penalties.

“We’re sitting here again talking about the same things,” Kelly said. “About not finishing when you have an opponent in a position to put them away. But what we’re doing on the sideline is feeling like the game is over. And I am so angry about it that I’ve got to do something about it. I’m not doing a good enough job as a coach.

“It’s unacceptable for us not to have found a way to win this game. It’s ridiculous. It’s crazy.”

Kelly said LSU did not play complementary football. When the offense was clicking, he felt the defense let off. When the defense stuffed USC on fourth down midway through the fourth, the offense went 3-and-out and gave the ball right back to the Trojans, who marched down the field to score a touchdown and capture momentum.

“But the thing that’s most concerning to me are the personal fouls,” he said. “The penalties that are selfish. Both of them led to scores and they’re undisciplined penalties. Effectively, they fall back on me. We take pride in running a disciplined program but we have clearly not done a good enough job there. It impacted the game.”

On the fourth-down stop, LSU defensive back Major Burns was flagged for removing his helmet on the field and LSU lost 15 yards because of it to start the possession.

On the drive after USC took a 20-17 lead, LSU opened with a false start — 1 of 3 called on the LSU offensive line in the game.

LSU was called for pass interference twice. Jardin Gilbert was also flagged for targeting on a USC completion that turned a 20-yard pass into a 34-yard gain and put the Trojans at the LSU 13-yard-line with 8 seconds to play.

“Ten (penalties) is too many,” Kelly said. “But 2 personal foul penalties that set up scores are unacceptable.”

When the Tigers go back and look at the tape, they’ll feel like they let a game slip away that they did enough in to win.

Kelly felt the Tigers were complacent after taking a 17-13 lead late in the third. He said LSU’s offensive inability to pay off drives that reached the endzone put too much pressure on the defense to “be something that they’re not ready to be.” He says LSU doesn’t “know how to handle ourselves” when it gets up in games, and that much is clear after the Week 1 loss.