There have already been a few crypto sponsorship in the English Premier League.

Wolverhampton Wanders are sponsored by Coindeal: https://medium.com/@altcoinbuzz/cryptocurrency-exchange-now-sponsors-a-premier-league-team-502da68d0bc0

The logo is even on their shirt sleeves:



Arsenal were sponsored by CashBet:

https://www.theguardian.com/technology/2018/jan/24/arsenal-seals-major-sports-first-cryptocurrency-sponsorship-deal



An ICO even sponsored a few matches: https://bitcointalk.org/index.php?topic=3117898.0

I'm sure it's only a matter of time before more companies start sponsoring teams. Maybe there will be one that sponsors the front of their shirt eventually. That would be very sweet.