The Philadelphia 76ers partner, and creator of the Challenge, joined us Friday on "TMZ Live" and couldn't stop gushing about the efforts of Chris, David and a host of others raising money to feed Americans in the pandemic.
Michael says David's a shining example ... the illusionist held an auction and offered to fly to the winner's home for a private magic show, and the winning bid came in at $220,000. But, David didn't stop with one show, he did it three times over -- getting the runner-up and second runner-up to match -- and raised $660k for food charities.
Chris caught the All In bug too ... offering the chance to get eaten by a dinosaur in the 'Jurassic Park' franchise, first as an auction and then again as a sweepstake you can enter for just $10.
Michael says golf icons Tiger Woods and Phil Mickelsonalso double-dipped with auctions and sweepstakes, with Tiger offering a trip to the Bahamas and putting lessons, and Phil offering the chance at a round with a Masters champion.
So far, the Challenge has raised over $33 million and Michael told us what's impressed him the most about celebs taking charge.