Mario Henderson died at age 35, October 21, 2020, the date with 35 numerology, as well as 71, plus it was the day leaving 71 days in the year.

10/21/2020 = 10+21+20+20 = 71

10/21/2020 = 10+21+(2+0+2+0) = 35

Notice he died right before his 36th birthday, dying at 35.

https://www.foxnews.com/sports/former-raiders-mario-henderson-dead-at-35-team-says