Yeah, the article seems to reference this post:
https://opendorse.com/blog/top-100-highest-paid-athlete-endo...
Yet, this article from Sports Illustrated claims Derrick Rose and John Wall have multi-million dollar endorsement deals with Adidas that would have been active in 2019.
https://www.si.com/nba/2018/02/06/derrick-rose-adidas-sneake...
This article from Forbes claims footballers like Sergio Ramos and Luis Suárez earned more than $1 million through endorsements in 2019.
https://www.forbes.com/sites/christinasettimi/2019/06/18/the...
It might not be an order of magnitude, but there are certainly many more professional athletes who earned more than $1 million in endorsements in 2019.