Why NBA coaches stopped wearing suits: the 2020 change

What changed for the 2020–21 season?

NBA coaches moved toward a more casual sideline look when the league relaxed its clothing requirements. In December 2020, the NBA Coaches Association confirmed that coaches would be allowed to dress more casually for the 2020–21 season. The association described the change as part of its work with the NBA on wardrobe guidelines. [1]

ESPN’s contemporary reporting described jacketless outfits and polo shirts as permitted options. The important distinction is permission: the change gave coaches more choice about what to wear; it did not mean that every coach suddenly preferred the same outfit. [2]

Why did coaches want a simpler approach?

The discussion took place under the unusual conditions of the pandemic-era season. Rick Carlisle, then president of the coaches’ association, told ESPN that he preferred suits in normal circumstances, while acknowledging that circumstances were not normal. He also pointed to the number of assistant coaches traveling with teams and the need to find a simple, coordinated approach. [2]

Carlisle’s comments show why the change should not be reduced to a unanimous rejection of suits. A coach could value the formal tradition and still recognize practical reasons for different arrangements that season. The association was considering how its members would present themselves together, including how much different coaching staffs’ outfits should vary. [2]

Casual did not mean unrestricted

For 2020–21, ESPN reported that the permitted business attire included dress shirts or polo shirts, pants, socks and shoes. Its sources said sweatpants and jogging pants were not permitted under that season’s guidelines. Those details describe that historical report; they should not be treated as a current-season clothing checklist. [2]

The NBA Coaches Association’s December 10 statement supports the broader point directly: the league had approved a more casual look, and coaches were preparing to express their own styles within the changed guidelines. [1]

Which dates does this explanation cover?

The ESPN report was first published December 8, 2020, in Eastern Time; its machine-readable publication time is December 9 in UTC. The association’s confirmation followed on December 10. These are dates of the contemporary reports, not the publication date of a new dress-code rule today. [1] [2]

This guide explains the documented 2020–21 change. It does not establish the complete 2026–27 policy, identify every coach’s current clothing choices, or date the beginning of the earlier suit tradition. Those questions need their own evidence.

Contemporary sources

These reports describe the 2020–21 season. Their publication dates remain separate from the dates we checked the source pages.

1. New Style for the 2020-21 NBA Season — NBA Coaches Association. Published 2020-12-10 UTC. Source checked 2026-10-01 UTC.
2. NBA relaxes coaching attire rules, per sources: Suit jackets optional, masks not — ESPN. Published 2020-12-09 UTC. Source checked 2026-10-01 UTC.