David Letterman tries trolling Kevin Durant!?! Yeah, that happened today too.

@meanbarb (Barbara Barker) We still know who Kevin Durant is. David Letterman? Uh, not so much.

Letterman, sporting a face mask over a flowing white beard, was for some still unexplained reason seated at the back of the press room at Barclays Center for Monday’s Media Day. The 74-year-old late night legend identified himself as “Dave from Basketball Digest” and began peppering Kevin Durant with questions that seemed, well, a bit bizarre.

Here’s a snippet recorded by the Nets official website...

Letterman’s first question: “Why do people call you ‘KD’?”

Durant, his eyes tightening in a questioning squint, patiently explained that his first name begins with a “K” and his last with a “D”. That out…