History of 4 seeds vs. 13 seeds in March Madness
The 13-4 March Madness upset is rare, but it happens enough that we shouldn't be shocked when it does. Here's the history of 13-seeds vs. 4-seeds in the NCAA tournament.source https://www.ncaa.com/news/basketball-men/article/2022-03-02/history-4-seeds-vs-13-seeds-march-madness