KAPALUA, Maui >> About the only drama in last year’s SBS Tournament of Champions was whether Jordan Spieth would set the PGA Tour scoring record for a 72-hole event en route to winning by eight shots.

If the second-round leaderboard is any indication, this year’s event could be a real nail-biter come Sunday. With about 30 minutes left in Friday’s second round, there was a five-way tie for first, with Justin Thomas and Ryan Moore breaking from the pack with birdies at the last.

Their back-to-back 67s left them in the lead at the halfway point of this $6.1 million winners-only golf tournament at 12-under 134, one shot clear of Patrick Reed, whose 65 was the best round of the day, and first-round leader Jimmy Walker (70).

And these four guys aren’t exactly alone.

Jason Dufner is another shot back at 10-under 136 with consecutive 68s, despite a bogey at 18. Japan’s Hideki Matsuyama overcame a double bogey at the tough par-4 17th to birdie 18 and shoot a 68 that left him alone in sixth at 9-under 137. In all, there are 10 golfers within four shots of the lead and 14 within five, including world No. 1 Jason Day (69—139) in ideal conditions on the expansive Plantation Course.

There were a dozen rounds in the 60s, with 28 of the 32 golfers landing in the red, thanks in part to little wind and no rain. Only a week ago, the course was flooded as Maui endured nearly a month of steady downpours. But the track is drying out, and if the weather holds, scores should be low and emotions high through the weekend.

“On this golf course, you need to make birdies,” said Moore, who has hit 26 of 30 fairways and 33 of 36 greens and needed 60 putts on the par-73 course. “That’s all there is to it. I mean, it gets close to 20ish every single year, and you know it’s going to be around that. I’m sitting at 12. I know I have a ways to go to get to that point.

“The guys who are around me are obviously great players and they have won tournaments on the PGA Tour to be here and are playing well this week already. So, it will be interesting to see if the wind stays down or if it changes the course a little bit. You kind of wait until you show up to the course every day to see how it’s going to play. I’m looking forward to it and it’s fun to be in contention going into the weekend the first tournament out of the gate.”

While Moore carded two birdies and a bogey on the front and five birdies on the back, Thomas was busy dropping three birdies on the opening nine and four on the back with a surprising bogey at the par-5 15th after missing a 4-footer for par. He has found 23 of 30 fairways and 33 of 36 greens and needed 59 putts over his opening 36 holes.

“I haven’t been playing as well as the scores show, so that’s always a positive,” Thomas said. “It’s frustrating sometimes when you’re playing well and you’re not getting much out of it, but I feel like I’m really getting a lot out of my game. I’m just not hitting my irons as well as I’d like, so it’s been nice to get around here with only one bogey so far.

“I’ve just been kind of managing it around and hitting a lot of greens. I mean, obviously they are big out here, so it’s easy to do so. So I just made the key putts that I feel like I need to and I’m in a good spot.”

So is Reed, who hit all 18 greens in regulation for the first time in his career. To make matters worse for the rest of the field, the 2015 champion and last year’s runner-up to Spieth has been a little under the weather. If he can go 11 under not feeling well, imagine what Reed will be like come the weekend.

“Thursday, I felt like a little setback — I didn’t feel very good,” Reed said. “Today I don’t really feel much better than yesterday. The only thing is — you know, yesterday I had a lot of lip-outs. I had a lot of lip-out putts. I tried to do too much. I tried to hit the hard golf shots and swinging really hard at some of the shots rather than swinging easy.

“You know, when you’re sick, you don’t really have much body control. You don’t have really any sense of feel or touch. Because of that, when you’re trying to swing hard, it just led to careless mistakes and careless bogeys. Today I really made sure that if I had a full number, I clubbed down and hit it softer. Seemed to work. Was able to hit it a lot closer to the hole and stay away from mental mistakes.”