AP Photo by John Bazemore / Miami Heat guard Kendrick Nunn brings the ball up during the second half of Thursday's game against the host Atlanta Hawks.

ATLANTA — Kendrick Nunn is enjoying the best start of any undrafted player in NBA history.

The rookie is taking the Miami Heat along for the ride.

Nunn scored a career-high 28 points to add to his record-setting start as Miami beat Atlanta 106-97 on Thursday night, giving the Heat two wins over the Hawks in three days.

Nunn's 112 points are the highest total through the first five games for any undrafted player in NBA history. Connie Hawkins of the Phoenix Suns scored 105 points in his first five games of the 1969-70 season.

"It's surreal a little bit," Nunn said. " All I needed was the opportunity."

Nunn, a 6-foot-2 guard from Oakland University in Michigan, scored 14 points in the third quarter. He began his career with 24 points against the Memphis Grizzlies on Oct. 23, and he has kept shooting. He has scored at least 24 points three times in Miami's first five games.

"He can shoot it," Hawks rookie Cam Reddish said. "I have a lot of respect for that guy."

Another record-setting rookie, Tyler Herro, had 17 points. Herro scored 29 points off the bench in the Heat's 112-97 win over Atlanta on Tuesday night to set a franchise record for a rookie reserve.

The rookies have helped Miami (4-1) enjoy a strong start. Herro and Nunn are feeding off Jimmy Butler, who had 11 assists while scoring only five points Thursday. He added nine rebounds, six steals and blocked three shots.

The Heat had 29 assists with only 13 turnovers.

"To tell you the truth, that was winning basketball today," Butler said.

Nunn was impressed by Butler's play, especially the assists.

"That's huge, for your star player to be unselfish like that," Nunn said.

Butler had 21 points in his Heat debut on Tuesday night, but he said he doesn't have to score big to do his job.

"I'm not here to score 50 points or whatever. If we win, I'm good," he said.

Reddish filled in at point guard for Trae Young, who was held out with a sprained right ankle that occurred in Tuesday's game but did not appear to be limping before Thursday's game.

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AP photo by John Bazemore / Injured Atlanta Hawks point guard Trae Young, center, sits on the Atlanta bench during the second half of the Hawks' home loss to the Miami Heat on Thursday night.

Jabari Parker led Atlanta with 23 points, and DeAndre Bembry added 18 points, 10 rebounds and eight assists.

Miami held a lead of 18 points, but Atlanta made a late comeback attempt.

Bembry's steal and basket cut Miami's lead to 94-88 midway through the final period. After a timeout, Meyers Leonard sank two 3-pointers for Miami, followed by a Nunn layup, for a 102-88 lead. Leonard had 16 points.

Reddish had nine points with four assists and only one turnover. Hawks coach Lloyd Pierce said Reddish had a good start before crossing the "fine line between playing with good pace and playing too fast."

Reddish, who joined De'Andre Hunter as rookie starters, said "I feel like I learned a lot tonight, especially at that position. I've got to slow down and let the game come to me."

The Heat took the lead with a string of 3-pointers late in the opening period, including Bam Adebayo's fourth career 3 and first of the season. Miami made 14 of 37 attempts from 3-point range in the game, including four of six by Nunn.

Miami coach Erik Spoelstra made a successful challenge of a charge call against Adebayo in the second period. Miami made 14 of 37 3s, including four of six by Nunn.

Playing behind Reddish, Atlanta's Tyrone Wallace helped spark a 10-1 run late in the first half. Wallace had six points in the second quarter and 12 overall in his second game after being claimed off waivers on Oct. 23.

Parker's points came off the bench. He had eight rebounds and played 25 minutes.

Said Pierce: "I think he's going to have an opportunity to be a sixth man of the year candidate, and we're going to use him that way."