LeBron James delivered the message multiple times in the sullen and stunned losing locker room.

"I've got to be better," James said after the San Antonio Spurs crushed the Miami Heat 113-77 in Game 3 on Tuesday.

He said it no less than five times during a six-minute postgame interview at his cubicle.

James had one of the worst playoff games of his career – 15 points on 7-for-21 shooting – invoking memories of his 3-for-11, eight-point performance against the Dallas Mavericks in Game 4 of the 2011. Finals.

With 3:04 left in the third quarter, James had made just 2 of 13 field goals, and the Heat were well on their way to their worst playoff loss in franchise history and worst loss of the season.

"I'm putting everything on my chest and on my shoulders," James said. "I've got to be better. It's that simple. My teammates are doing a great job, and I'm not doing my part."

For the third consecutive game, James failed to score at least 20 points. It's the first time he has not reached 20 points in three straight games since the 2011 Finals.

James is averaging 16.7 points and shooting 38.9% from the field, including just 3-for-13 on three-pointers. All the more surprising because James set career highs in field goal percentage and three-point shooting percentage this season.

But he has not been at the top of his game against the Spurs. He had an amazing eight-minute stretch in Game 2, but other than that the MVP has been pedestrian.

"I've got to do more. I've got to do more both offensively and defensively," James said. "I've got to put the ball in the basket. I had some great looks. They didn't go."