Overlooked during the regular season and given little chance to upset the reigning East champions, the Pacers took a 2-1 lead in the best-of-seven series.
Game 4 is Sunday at raucous Bankers Life Fieldhouse.
LeBron James scored 22 — 16 in the first half before wearing down — and Mario Chalmers added 25 for Miami. However, Dwyane Wade scored only 5 on 2-of-13 shooting for the Heat, already missing forward Chris Bosh because of a strained abdominal muscle and not expected to return for this series.
Indiana outscored Miami 51-32 in the second half, when the Pacers could do no wrong.
SPURS 105, CLIPPERS 88
SAN ANTONIO (AP) — Tony Parker scored 22 points on his 30th birthday, Tim Duncan had 18 and San Antonio beat fading Los Angeles, pushing its winning streak to 16 and taking a 2-0 lead in the Western Conference semifinal.
Chris Paul responded to his awful Game 1 with only a slightly better encore, scoring 10 points as the Clippers now head home desperate to steer out of what's starting to get the feel of a sweep.
Blake Griffin led the Clippers with 20 points. His plan to manage his ailing knee so the all-star would have enough steam for the fourth quarter proved moot, as both teams emptied their benches with another Spurs blowout assured.
Game 3 is Saturday in Los Angeles.
Boris Diaw added 16 points and Danny Green had 13 for the Spurs. Manu Ginobili scored 10 and was held scoreless in the second half.