Loudon, N.H. — Kyle Busch tossed his 2-year-old son in the air during his latest victory lane celebration.

He’s taking baby steps toward catching The King.

Busch dominated yet again to win the NASCAR Xfinity Series race Saturday at New Hampshire Motor Speedway.

He won for the third time this season and 89th time in his career in the second-tier series. On Saturday night, he told SiriusXM NASCAR Radio that he plans to retire from the Xfinity Series when he gets to 100 victories.

He has 175 career wins over NASCAR’s three national series: Cup (38 wins; 2015 champion); Xfinity (89; 2009 champion); and Truck (48). Richard Petty is NASCAR’s career leader with 200 wins, all at the Cup level.

“I know a lot of those are the minors, so I’ll take them where I can get ‘em as of right now,” Busch said. “But certainly there’s going to be a lot more wins to be had on Sundays, as well. I’ve got a long road ahead of me, probably.”

Busch started from the pole and wasn’t challenged much late after an early duel with fellow Cup regular Brad Keselowski. Keselowski led 102 laps but had nothing for Busch down the stretch because of a pit road penalty.

“It is always fun being fast and leading the most laps and all that but we just didn’t put the whole race together,” Keselowski said.

Busch’s No. 18 Toyota was one of just six cars that finished on the lead lap.

Ryan Preece was second, followed by William Byron, Kyle Larson and Keselowski. Larson was set to start the Cup race Sunday from the pole until his car failed inspection and forced him to the rear of the field.

Series points leader Elliott Sadler was seventh in a race that included a 58-minute rain delay. He has a 45-point lead over Byron.

The 19-year-old Byron had his sixth top-five of the season. He has two victories driving for JR Motorsports and has made a case…