Mac McClung, Vince Carter Star In Commercial After Slam Dunk Contest Fame

Mac McClung is a full-blown superstar following his incredible performance during All-Star Weekend last month -- the guy has gone from the G League to the big screen ... starring in a commercial with Vince Carter!!

The 24-year-old high-flying baller became a household name after stealing the show at the NBA Slam Dunk Contest and taking home the hardware over Kenyon Martin Jr., Trey Murphy and Jericho Sims ... which breathed life back into the event that, as of recently, lacked excitement.

Mac has been landing a ton of endorsements following his big win ... but the coolest might be his 30-second ad for the upcoming 'Dungeons and Dragons' movie that dropped on Friday -- 'cause Vinsanity himself got involved!!

Of course, Carter was also known for his rim-rattling abilities over the course of his career ... and put together one of the most iconic dunk contest performances when he won in 2000.

Naturally, Mac was nabbed to show off his dunking skills as he jumped over CGI flames in the ad ... and at the end, Vince gives the kid props on his hops -- almost like he was passing the torch to the young hooper.

BTW -- Mac is currently balling out in the G League for the Philadelphia 76ers' Delaware Blue Coats ... averaging 20 points a game this season.

Something tells us we ain't heard the last of Mac!!