The club-crest changes more often than I expected. It is worth visiting the amazing Historicalkits website to see how often this happens. The site also shows a bewildering array of shirt sponsors. It is a treasure trove for those setting questions for a table quiz. What team was recently sponsored by Oak Furnitureland? Can you name a current Premier League team, that as recently as 2011, had the shirt supplier double as the shirt sponsor?
Not surprisingly, there is a much smaller pool of shirt suppliers than shirt sponsors. Adidas dominates with its logo featuring on the shirts of five clubs. Puma and Umbro have three clubs each. Two shirt are supplier by Under Armour and another two by Macron. That is a total of 15. There are five clubs, and five shirt suppliers, outside of this group of 15. The five clubs are Liverpool, Manchester City, Watford, AFC Bournemouth, and Swansea City. Who are the shirt suppliers? Another sports quiz question.
Nike is one of the answers to the last question. It will double its number of clubs when it replaces Adidas on the Chelsea shirt. A £60m a season deal for 15 years was confirmed last October (here). Chelsea's new deal has them third in the list of most lucrative shirt deals (here).
Will the Chelsea deal run the full 15 years? Don't be surprised if it is renegotiated. Only a couple of years ago, Adidas replaced Nike on the Manchester United shirt. Given the importance of the shirt supplier for the authenticity of the shirt, it is easy to understand the commercial benefits of such changes.