Adidas

• The most well known and historic partnership with a sports league Adidas has is with FIFA, whom they've partnered with since 1970, when they began supplying official match balls for FIFA World Cup matches

• Adidas is the Official Partner, Supplier and Licensee for the FIFA World Cup and all FIFA events until 2030.
• Adidas also is partnered with the US Olympics and in 2020 will serve as uniform providers for many US teams.  
• The Little League Baseball & Softball teams also hve a multi-year partnership with Adidas.
• Specifically, Adidas provides all the uniforms, footwear, and coaches apparel for the Little League World Series.  

• Adidas also has a official partnership with team Manchester United, as their Technical Sponsor and Official Licensing Partner.

Reebok

• While Reebok previously had a partnership with the NHL (2007-2017), parent company Adidas asked the NHL to replace Reebok as its official uniform supplier, and has made efforts to lower the team sports association of Reebok, with aims of making it more of a casual fitness brand. 

• Reebok is also partnered with the UFC, however the sponsorship payments they've made to athletes have decreased significantly in the past couple years.