Gordon had an MRI on Tuesday that revealed significant "debris" in his right knee and he decided to undergo the procedure. D'Antoni told reporters the surgery will take place Wednesday.
"It's been bothering him, actually, from the middle of last year," D'Antoni said. "I think he's probably relieved that he can clean it up, get it going, so he can come back as strong as ever."
Gordon has gotten off to a slow start this season, averaging 10.9 points in 29.4 minutes per game. In nine contests in 2019, he has averaged more turnovers (1.3) than assists (0.8).
D'Antoni said Chris Clemons, an undrafted rookie out of Campbell University, will replace Gordon when Russell Westbrook isn't on the court. Ben McLemore and Austin Rivers will also receive additional minutes.