Indiana (64-37 straight up, 49-51-1 against the spread) has a 2-1 advantage in the NBA Finals after capturing a 116-107 win over Oklahoma City as a 5.5-point home underdog in Wednesday’s Game 3 at Gainbridge Fieldhouse.

The Pacers hooked up money-line supporters with a +190 payout, while the 223 combined points dropped ‘under’ the 225.5-point total.

Bennedict Mathurin was the catalyst with a game-high 27 points in merely 22 minutes of playing time from off the bench. He drained 9-of-12 field-goal attempts, 2-of-3 launches from 3-point land and 7-of-8 free throws. It was the most points scored by a reserve in the NBA Finals since Jason Terry in 2011.

T.J. McConnell and Obi Toppin also played critical roles with Indiana’s second unit. McConnell contributed 10 points, five assists and five steals in only 15 minutes of action, and Toppin posted a team-best plus-minus of +18 with eight points, six rebounds and a pair of blocked shots.

Tyrese Haliburton had 22 points, 11 assists, nine rebounds, two steals and one block. He knocked down 9-of-17 FGAs and 4-of-8 attempts from downtown.

Pascal Siakam finished with 21 points, six rebounds, two steals, one block and four assists without a turnover. He buried 8-of-14 shots from the field and 5-of-6 free throws.

“This is the kind of team that we are,” Pacers head coach Rick Carlisle said. “We need everybody to be ready. It’s not always going to be exactly the same guys that are stepping up with scoring and stuff like that, but this is how we got to do it. We got to do it as a team.”

OKC jumped out to a 32-24 lead to cover the number for first-quarter bets (-1.5 or -2), but Indiana responded with a 40-28 advantage in the second quarter to take a four-point lead into halftime.

The Thunder surged back into the lead with an 8-0 run in less than two minutes to start the third quarter. They closed the frame with a 6-0 spurt to take an 89-84 lead on Jalen Williams’ 3-pointer with 2.1 seconds left in the third.

The game was tied at 98-98 when Haliburton checked in for McConnell with 7:04 remaining. He didn’t waste any time getting involved.

When OKC’s Isaiah Hartenstein missed a driving layup, Haliburton rebounded the miss. At the other end, he buried a 25-footer to put the Pacers ahead for good, 101-98, with 6:42 left.

A bucket from Williams cut Indiana’s lead to one, but Myles Turner countered with a basket off an assist from Haliburton. Turner rejected Chet Holmgren in the lane on OKC’s next possession.

Next, Haliburton rebounded his own miss. Moments later, Andrew Nembhard hit a stepback jumper to give the Pacers a five-point advantage. After Lu Dort was off on a trey, Toppin rebounded the miss. The Dayton product then jammed home a putback off a Haliburton miss to give Indiana a 107-100 lead with 4:23 remaining.

A jumper by Shai Gilgeous-Alexander trimmed the deficit to five briefly, but Aaron Nesmith responded with a 3-pointer off an assist from Haliburton to make it 110-102 with 3:04 left.

The Thunder never got closer than six the rest of the way.

Williams scored a team-best 26 points in the losing effort, but he coughed up four turnovers. Gilgeous-Alexander had 24 points, eight rebounds, four assists and three blocked shots, but he committed six turnovers.

Holmgren had a double-double with 20 points and 10 boards. Dort hit 4-of-5 attempts from long distance and finished with 12 points.

OKC had a 42-36 rebounding advantage and made 10-of-22 (45.5%) shots from 3-point land. Indiana hit just 9-of-27 (33.3%) from downtown, but the Pacers shot at a 51.8 percent clip from the field (44-of-85). The Thunder committed 17 turnovers compared to 13 for Indiana.

“We had a lot of good stretches of the game,” OKC head coach Mark Daigneault said. “But they had more good stretches than we did — and outplayed us over the course of 48 minutes.”

If NBA Finals history is an indicator, Indiana is in great shape now. In the 41 previous NBA Finals that were tied at 1-1, the winner of Game 3 has gone on to win the series 33 times (80.5%).

However, FanDuel has OKC (81-21 SU, 63-35-4 ATS) as a -230 ‘chalk’ to rally and win the series. The Pacers have +190 odds on the comeback.

As of early Thursday afternoon, most books had the Thunder installed as a six-point road favorite in Friday’s Game 4. The total was 225 points at Circa and 226 points at Caesars, but most other shops were using 225.5. Indiana was in the +185 to +200 range on the money line.

Most books had OKC -2 for first-quarter wagers, but the Westgate SuperBook had -2.5. The Thunder were -3.5 in the first half at most spots with a total of 114.5 points.

Gilgeous-Alexander remains the favorite to win NBA Finals MVP honors at -240. The next-shortest odds belong to Haliburton (+270), Siakam (+1000 or 10/1), Williams (80/1) and Holmgren (95/1).

FanDuel has the ‘over/under’ for total games in the series set at 6.5 (‘under’ -128, ‘over’ +104).

As for the series spread, OKC is -1.5 games for a +194 payout. Indiana is -1.5 games for a +330 return and -2.5 games for a +980 payout.

Friday’s Game 4 will tip at 8:30 p.m. Eastern on ABC.