Lions' Jim Caldwell 'didn't condone' Dominic Riaola's late block

Wednesday's health and safety news from the world of football:

  • SportsTechie looked at what it called the best concussion-detection devices available for the NFL.
  • Medical Xpress reported on a study in the Journal of Neurotrauma that which identified protein in post-concussion severity in professional athletes.

-- Bill Bradley, contributing editor

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