Death of Dale Hawerchuk, August 18, 2020
Notice, he played 16 seasons in the NHL, and he died 136 days after his birthday, and 136 is the 16th triangular number.
*You could also say he died on his 137th day of his age, the 33rd prime
As for him dying at age 57, that is a number often related to championships in all of sports, college and pro.