Clippers Spencer Hawes -- Rocks Amazing Hideous Xmas Suit ... Tribute to Craig Sager

It might be the most incredible/disgusting/amazing outfit ever worn by a NBA player -- the holiday suit Spencer Hawes wore on the bench during last night's Clippers vs. Warriors game.

But there was a reason the Clippers 7-footer decided to rock the nasty red, white and green look ... it was all a tribute to TNT's legendary sideline reporter Craig Sager ... who's famous for his outrageous fashion statements.

Unfortunately, Craig's battling leukemia and hasn't worked this season -- so Spencer felt he would pick up the Xmas day slack.

In fact, Hawes -- who was sidelined with an injury last night -- tweeted, "Mr. Sager do you approve? Merry Christmas!"