Ex-Cowboys RB Marion Barber III died of heat stroke, authorities say
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Former Cowboys, Bears RB Marion Barber III's death caused by heat
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ESPN - Former Dallas Cowboys and Chicago Bears RB Marion Barber
Former Dallas Cowboys RB Marion Barber III died of heat stroke
Cowboys' Marion Barber's brain will not be donated for CTE
Sunday Night Football on NBC - Marion Barber III was 38 years old