Tragedy struck the Stanford University family Thursday when news emerged that former two-sport star Zach Hoffpauir had died. He was 26 years old.

The young man was staying with his father in Arizona, and a cause of death has not been reported.

Hoffpauir had just been hired at Northern Colorado as a defensive backs coach by head coach Ed McCaffrey. Ed's son, Carolina Panthers running back Christian McCaffrey, took to Instagram to post and emotional a tribute to Hoffpauir, with whom he played ball at Stanford.