No single "official" athletic footwear brand exists universally.
The query appears incomplete (e.g., "an..." might refer to "NBA," "NFL," or another entity), but major leagues and events typically partner with specific brands via sponsorship deals. Here's a breakdown based on prominent examples as of early 2026.

NBA Partnership

Nike holds the official NBA on-court footwear deal.
Since 2017, Nike supplies uniforms, shoes, and apparel for all 30 teams, extending through 2030 with Jordan Brand as a key sub-line (e.g., player exclusives). This replaced Adidas after a $1 billion, 8-year contract.

NFL Uniform Sponsor

Nike is the NFL's official uniform and footwear provider.
Their deal, renewed in 2024, covers field-side gear for players and includes Nike, Jordan, and Converse options. No other brand has "official" status for pro games.

Olympic Games Ties

Nike outfits Team USA and many nations.
For the 2024 Paris Olympics (and likely 2028 LA), Nike provided custom spikes, trainers, and apparel. Asics and Puma sponsor select federations, but Nike dominates globally.

Other Major Deals

  • MLB: Nike (uniforms/footwear since 2020); Under Armour for some teams.
  • Premier League Soccer: No single brand; teams choose (e.g., Adidas for Arsenal, Nike for Chelsea).
  • WNBA: Nike, mirroring NBA.

League/Event| Official Footwear Brand| Deal Start/Notes
---|---|---
NBA| Nike| 2017–2030; $1B+ 1
NFL| Nike| Ongoing since 2012 1
Olympics (USA)| Nike| 2024+; athlete kits 9
Premier League| Varies by team| No league-wide 6

TL;DR at bottom: Nike leads as "official" for top U.S. pro leagues like NBA/NFL; specify the association (e.g., "NBA") for precision. Check official sites for latest, as deals evolve.

Information gathered from public forums or data available on the internet and portrayed here.