PeekURL

Twitter-friendly video player. Sponsored by @24AheadDotCom

John Mackey's Death Renews Focus on NFL Brain Trauma

Read the Transcript: http://to.pbs.org/nI2kfH Pro Football Hall of Famer and legendary Baltimore Colts tight end, John Mackey died Wednesday, at the age of 69, after a struggle with dementia. Ray Suarez looks back on Mackey's work after his professional football career focused on the link between football and brain disease.

video image