It’s always special when a player scores three goals in an NHL game, but Jaden Schwartz’s performance Friday night carried added significance.

The St. Louis Blues winger recorded his second career hat trick in a 7-5 win over the Dallas Stars, and he did it on the four-year anniversary of his sister’s death while wearing her jersey number.

Mandi Schwartz, who played hockey for Yale, was 23 when she died after a fight with leukemia. She inspired thousands to sign up as volunteers to donate bone marrow, and the Yale donor registration drives that carry her name have resulted in at least 24 life-saving matches.

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In July, Jaden announced that he would be switching his jersey number from 9 to 17 for his sister. Fast forward to Friday:

Now that’s pretty special.