NBA star DeMar DeRozan gave fans an experience they'll never forget after balling out in the Drew League on Saturday -- posing for pics and signing autographs for them, and TMZ Sports has the video!!
The Chicago Bulls forward and his teammate, Patrick Williams, led the MMV Cheaters back from a 19-point deficit to come away with a 102-94 win over Young Citi ... large in part thanks to DeRozan's 36 points and 6 rebounds.
Williams added 14 points and 14 boards himself ... but it was DD who came away with the player of the game nod.