Matthew Hammerdorfer tribute: Friends, family mourn after teen athlete's death (PHOTOS)

The shocking death of Fort Collins' Matthew Hammerdorfer, seventeen, after being stricken during a rugby match is echoing nationwide. After all, he's the second teen athlete with an enlarged heart to die of cardiac arrest in a week, following Michigan's Wes Leonard, whose story made ESPN. But as experts debate how to prevent such tragedies, Hammerdorfer's loved ones mourn on the We Love You Matthew Hammerdorfer Facebook page.