Porzingis tore his left ACL after he fell awkwardly following a dunk over Giannis Antetokounmpo.
Another All-Star has suffered a major injury.
Knicks forward Kristaps Porzingis tore the ACL in his left knee on Tuesday night when he fell awkwardly in the second quarter of the Knicks-Bucks game at Madison Square Garden. Though not official, Porzingis will almost certainly have surgery and miss the rest of the season.
Porzingis landed on fellow All-Star Giannis Antetokounmpo's leg after Porzingis dunked on him with nine minutes left in the third quarter. Upon landing, he immediately grabbed his left knee and was in visible pain before being helped off the floor. Porzingis left the arena to get an MRI, which confirmed the tear.
Porzingis, 22, is averaging 22.9 points, 6.7 rebounds, 1.4 assists and a league-leading 2.4 blocks per game. He was voted to his first-ever All-Star game as a reserve.
The Knicks entered Tuesday night's contest with a 23-31 record and sat four games out of the eighth and final playoff spot in the Eastern Conference. Should Porzingis miss an extended period of time, New York's hopes of a playoff push would take a serious hit.
A number of All-Stars have suffered significant injuries since being named to the All-Star team. DeMarcus Cousins will miss the rest of the season after he tore his Achilles, John Wall had knee surgery that will keep him out for six weeks and Kevin Love will miss time with a broken bone is his hand.