All right, it has been quantified. Kristaps Porzingis fever officially has gripped the NBA as the 7-3 Knicks rookie’s jersey is the fourth most popular in the league, even though he’s played in only 43 NBA games.

The league released Wednesday morning its sales figures from the NBA Store’s website from October 2015 through December 2015 and the rookie Porzingis ranked fourth behind only league MVP Stephen Curry of Golden State, Cleveland’s LeBron James and the Lakers’ Kobe Bryant.

Porzingis, who is averaging 14 points, eight rebounds and two blocks, is the first rookie to debut in the top five in sales since James was No. 1 and Carmelo Anthony, then with Denver, was No. 2 in December 2003.

StoryTwo scouts share their thoughts about PorzingisStoryPorzingis doesn’t believe foot will sideline him

Anthony’s jersey ranked No. 15 in sales on the list released Wednesday, making the Knicks one of four teams to have at least two players in the top 15.

Here’s the top 15 players in jersey sales from October 2014 through December 2015:

1. Stephen Curry, Golden State Warriors

advertisement | advertise on newsday

2. LeBron James, Cleveland Cavaliers

3. Kobe Bryant, Los Angeles Lakers

4. Kristaps Porzingis, Knicks

5. Kevin Durant, Oklahoma City Thunder

6. Derrick Rose, Chicago Bulls

Knicks videos

7. Russell Westbrook, Oklahoma City Thunder

8. Kyrie Irving, Cleveland Cavaliers

9. James Harden, Houston Rockets

10. Jimmy Butler, Chicago Bulls

11. Klay Thompson, Golden State Warriors

advertisement | advertise on newsday

12. Paul George, Indiana Pacers

13. Anthony Davis, New Orleans Pelicans

14. Chris Paul, Los Angeles Clippers

15. Carmelo Anthony, Knicks

Here are the 10 most popular teams in merchandise:

advertisement | advertise on newsday

1. Golden State Warriors

2. Chicago Bulls

3. Cleveland Cavaliers

4. Los Angeles Lakers

5. Knicks

6. San Antonio Spurs

7. Oklahoma City Thunder

8. Miami Heat

9. Boston Celtics

10. Los Angeles Clippers