Mike Haynes, Hillenmeyer donating brains (AP)

[ASFN Admin]

Pro Football Hall of Famer Mike Haynes and current Chicago Bears linebacker Hunter Hillenmeyer are among more than a dozen NFL players who have pledged to donate their brain and spinal cord tissue for concussion research. Retired players Zach Thomas, Kyle Turley and Conrad Dobler also have said they'll help the Center for the Study of Traumatic Encephalopathy at Boston University School of...

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