NBA Official

NBA Referee Assignments

December 19, 2025

Referee assignments are posted at approximately 9:00am ET each game day.

Game Crew Chief Referee Umpire Alternate
Miami @ Boston Zach Zarba (#15) Jacyn Goble (#68) Biniam Maru (#94)
Philadelphia @ New York James Williams (#60) Marat Kogut (#32) Pat O'Connell (#90)
San Antonio @ Atlanta Kevin Scott (#24) Kevin Cutler (#34) Michael Smith (#38)
Chicago @ Cleveland Tre Maddox (#23) Ray Acosta (#54) Phenizee Ransom (#70)
Oklahoma City @ Minnesota Courtney Kirkland (#61) Nick Buchert (#3) John Butler (#30)

Replay Center: John Conley, Mitchell Ervin

G League Referee Assignments

December 19, 2025

Referee assignments are posted at approximately 9:00am ET each game day.

Game Crew Chief Referee Umpire Alternate
Stockton @ Austin Agon Abazi (#7) Catherine Chang (#30) Cameron Gelinas (#54)
Grand Rapids @ Greensboro Gina Catanzariti (#5) Ken Jones (#40) Jafar Kinsey (#38)
Maine @ Salt Lake City Nate Cearley (#26) JP Primm (#64) Ashley Birch (#16)
San Diego @ Raptors 905 Marcy Williams (#72) Ian McClenny (#59) Erik Aellig (#4)
Cleveland @ Memphis CP Painter (#66) Jason Alabanza (#10) Carlos Peralta Ortega (#18)
Osceola @ Noblesville Cameron Garber (#33) Julian McFadden (#52) Eric Lewis
Texas @ College Park Brent Haskill (#34) Matt Rafferty (#48) Quincy Smith (#39)
Santa Cruz @ Delaware Tyler Mirkovich (#41) Josh Reed (#28) Genesis Perrymond (#9)

Crew Chief Position

  • Proficient in Referee and Umpire positions
  • Leader of the crew, on and off the floor
  • High-level play calling, partnering skills, and tools for handling any game situation, including interpersonal communication
  • Understands the importance of extending into their secondary area of coverage, with accuracy

Referee Position

  • Proficient in all Umpire position requirements
  • Effectively the glue for a crew through consistency, teamwork, and communication - makes partners better by carrying a larger portion of the crew’s load than an Umpire
  • Capable of handling some plays in secondary area of coverage
  • Ability to recognize and appropriately manage shifts in game conditions (intensity, emotions, decorum, style of play etc.)

Umpire Position

  • Aggressively and accurately calls plays in the primary area of responsibility
  • Responsible for basic mechanics including rotations, positioning and clock and team foul awareness
  • Strong rules knowledge coupled with contributions to in-game discussions/issues regarding adjudication