Dustin Johnson ain't gonna let knee surgery keep him from helping those in need ... 'cause the golf superstar's spending his downtime stuffing backpacks to send over to the Bahamas!!
DJ just had arthroscopic surgery to repair cartilage damage in his left knee on Thursday ... while he's expected to return to the course later this year, he's sidelined for now.
The 35-year-old and his smokin' hot lady, Paulina Gretzky, are doing their part to help those affected by Hurricane Dorian ... hitting Costco to buy out a bunch of backpacks and supplies to send over to the kids in the Bahamas.