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#3 Jovan Belcher
Jovan Belcher went undrafted in the 2009 NFL Draft before signing with the Kansas City Chiefs as a free agent. He remained with the Chiefs as a starting linebacker for four seasons and appeared to have a bright future until disaster struck.
Belcher, who was just 25 years old at the time, fatally shot his 22-year-old girlfriend, Kasandra Perkins, in their home. He then drove to the Chiefs' practice facility and shot himself in the parking lot after staff members were unable to talk him out of it. He was diagnosed with CTE following an autopsy.
#2 Aaron Hernandez
Aaron Hernandez was once one of the best tight ends in the NFL during his short career with the New England Patriots. He recorded 210 receptions for 2,316 yards and 20 touchdowns across just three full seasons before off-field issues ended his career and his life early.
Hernandez was no stranger to controversy as he was often involved in legal trouble, including gang activity and violence. He was charged with first-degree murder in the death of Odin Lloyd and was sentenced to life in prison.
He committed suicide in his jail cell at just 27 years old and was later diagnosed with CTE.
#1 Kenny McKinley
Kenny McKinley was selected by the Denver Broncos in the fifth round of the 2009 NFL Draft. He contributed as a special teams player during his first season with the team before being placed on injured reserve with a knee injury.
About a year after he was drafted, McKinley was found dead in his home from a gunshot wound. It was later reported that he took his own life at just 23 years old due to a severe case of depression related to the injuries suffered during his rookie season and financial debts that had accumulated from gambling.
