Watch Shaquille O'Neal Dunk at 54 Years Old in Trending Video from Dunkman Competition

Shaquille O'Neal can still dunk 15 years after retiring from the NBA.

The 54-year-old reached up to the basket Tuesday in an event during the inaugural season of Dunkman, O'Neal's professional dunking league.

O'Neal founded Dunkman in April after recording around 4,000 total dunks in his NBA career.

Dunkman events have been airing on TNT and streaming on HBO Max every Tuesday.

No. 1 seed Isaiah Rivera earned a berth in the Dunkman world championship by winning the most recent event.

The dunking league continues competition with one more round of group stage competition next Tuesday before the Dunkman world championship takes places Aug. 25 at Overtime Elite Arena in Atlanta.