Pumped up American football coach headbutts player with helmet on and cuts forehead

SOME men will bleed for the cause when it comes to sport.

And that seemed to be the view of LSU's pumped up coach as he was left with a gash to his forehead after headbutting a player without wearing a helmet.

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The LSU strength coach is out here HEADBUTTING players without a helmet 😳

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Cameras caught the moment when assistant strength and conditioning coordinator Jake Reidel took a bizarre approach to his job.

After one of his colleagues had yelled at tight end Racey McMath, Reidel took a different approach.

He grabbed McMath by the helmet and then, despite not wearing a helmet, butted heads with him.

It appeared to work as the Tigers ran out 19-3 winners over Mississippi State Bulldogs.

 LSU Tigers head coach Ed Orgeron celebrates with players after the win

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LSU Tigers head coach Ed Orgeron celebrates with players after the win

But as Reidel walked away dabbing the blood from his forehead, he may have questioned whether it was worth it.

The incident may be an alarming sight to some quarters of American football given the concern over concussion in the sport.

Investigations into concussion have shown a rising number of retired NFL players suffering with dementia, Alzheimer's, depression and chronic traumatic encephalopathy (CTE).

Former Minnesote Vikings linebacker Fred McNeill died in 2015 at the age of 63 having been the first person to have CTE diagnosed while alive.

 Concussion is a big issue within American football

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Concussion is a big issue within American football

Fellow footballers Kevin Turner, who died in March 2016 at the age of 46, has the most advanced stage of CTE, which scientists believe is caused by repeated head trauma.

Its symptoms include depression, aggression and disorientation. Yet in most cases it can only be diagnosed after death.

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SOME men will bleed for the cause when it comes to sport.