MIAMI (AP) — The last time Kawhi Leonard scored this many points in a real basketball game, he was starring at Martin Luther King High School in Riverside, California.

Never in college. Never in the NBA, either. Until Tuesday night, that is.

And on the same floor where he missed a free throw that could have cost the San Antonio Spurs the title a year ago, he more than atoned in Game 3 of these NBA Finals. Leonard scored 29 points, his highest total since those high school days, to lead a display of offensive wizardry that carried the Spurs to a 111-92 win over the Miami Heat.

The Spurs lead the series 2-1, with Game 4 in Miami on Thursday.

Leonard made 10 of 13 shots, scored 16 of his points in a historic first quarter that gave San Antonio total control, and added nine more in the fourth to ensure that the Spurs wouldn’t let this one slip away.

San Antonio shot 76 percent in the first half to set a finals record, took a 71-50 lead at the break for the highest-scoring opening 24 minutes the title series had seen in 27 years, and scored more points in the first period of a finals game than anyone since 1967.

Danny Green and Tony Parker each scored 15 for the Spurs, and Tim Duncan added 14. The Spurs led by as many as 25 in the second quarter, matching the biggest lead any visitor has had in Miami since LeBron James, Chris Bosh and Dwyane Wade teamed up four years ago.

James and Wade each scored 22 for the Heat, who lost at home for the first time this postseason. And some numbers suggested the Heat didn’t play all that badly offensively — they shot 52 percent and made 10 3-pointers. But they also had 20 turnovers that led to 23 Spurs points, and allowed San Antonio to make a staggering 19 of its first 21 shots.

Yes, 19 of 21. The Spurs were shooting 91 percent at one point in the second quarter.

Leonard scored nine points in each of the first two finals games, and the Spurs were hoping to get more from their star-in-waiting.