SPUR-NED: Tim Duncan (nine points) hangs his head during the Spurs’ 103-84 Game 2 loss to the Heat last night in Miami. (Getty Images)
MIAMI — LeBron James didn’t have to score more. Instead, his Heat teammates rose to the scoring challenge.
James didn’t bring his “A” game for three quarters, but the Heat role players did and eventually King James caught up in a big way. Mario Chalmers turned into the Heat’s leading scorer — topping each of the Big 3 — and that spoke volumes about the bizarre nature of this rout.
With a devastating 33-5 run spanning late in the third quarter to midway through the fourth, the Heat bludgeoned the Spurs last night and posted a 103-84 blowout win to tie the best-of-seven NBA Finals at 1-1. The next three games are in San Antonio, starting tomorrow with Game 3.
James, 2-of-12 from the field midway through the third quarter, made the highlight play of the Heat’s mammoth surge — on the defensive end. Spurs center Tiago Splitter wound up for a monster dunk and James blocked it at the rim ever so cleanly with 8:20 left. It sprang Ray Allen for a 3-pointer and sent the arena into another deafening tizzy.
James finished with 17 points on 7-of-17 shooting with eight rebounds, seven assists and three blocks.
“I wanted to make an impact in some way,’’ said James, criticized after his triple-double performance in the Game 1 loss for a lack of aggressiveness on the offensive end. “Offensively it was a struggle for me, couldn’t make a shot, missed layups. I was able to protect the rim on that one. I told myself, you’re ending up on ‘SportsCenter’ where you’re going to get dunked on or getting a block. Luckily I was on the good side of the Top 10.’’
Chalmers, the Heat’s unsung starting point guard, scored a team-high 19 points to lead five players in double figures and two other Heat players with nine.
“That’s the thing, nobody waited [for LeBron],’’ Chalmers said. “We just tried to make the Spurs guard us and make it easier for him.’’
Dwyane Wade (10 points) and Chris Bosh (12 points), the other members of Miami’s Big 3, were just equal passengers on this wild ride while Allen came off the bench to bang in 13 points, draining three 3-pointers.
“The wealth was spread,’’ Allen said.
“LeBron couldn’t get in a rhythm early and other guys stepped up,’’ Miami coach Erik Spoelstra said. “He showed great poise and trust in not getting caught up in feeling he had to make the play or score but rather facilitate and let other guys make plays. And they did.’’
The Spurs’ Big 3 put forth a dud performance as San Antonio’s leading scorer was Long Island’s Danny Green, who finished with 17 points on a perfect 6-of-6 shooting.
“The Big 3 on both sides you can rely on them,” James said, “but I think the supporting cast is really why both teams are here.”
Tim Duncan had a particularly brutal evening (nine points, 3-of-13 shooting), looking all of his 37 years. It was his worst shooting percentage in a Finals game in his career. On Duncan’s lowest moment, James blocked him at the rim in the first half. Point guard Tony Parker, the hero of Game 1, scored 13 points on 5-of-14 shooting, outdone by Chalmers.
“Being 1-1, it’s not bad,’’ said Spurs guard Manu Ginobili, who scored five points. “But you don’t want to play like this in an NBA Finals. You don’t want to give them that much confidence.’’
The Spurs held a 62-61 lead with 3:11 left in the third quarter before they got overwhelmed. The Spurs committed just four turnovers in their Game 1 win, but last night they coughed it up 17 times.
“Not shooting well and turning it over is a bad combination,’’ Spurs coach Gregg Popovich said. “Miami played its [butt] off.’’
The Heat broke it open by going on a 14-3 run to close the third to take a 75-65 lead into the fourth, and they weren’t finished. The run was extended to 23-3 after Splitter had the ball knocked away, leading to a fast-break layup for James, who notched nine points in the fourth quarter on 4-of-4 shooting.
“I felt we had them on the ropes,’’ Chalmers said, regarding the 10-point bulge after three. “I told [LeBron], ‘Let’s go for the kill.’ He said, ‘I’m with you.’ ’’
To close the third, Allen and Mike Miller (nine points) hit big 3-pointers and Chalmers scored on a traditional three-point play on a floater in the lane.
“That’s why we won all year, getting everyone involved,’’ Wade said.
marc.berman@nypost.com