LIST: 6 rugby players who were knocked out by teammates

The Welshman hit headlines once again in 2013 after being knocked out in the Pig and Fiddle pub in Bath by one of his new teammate on Wednesday night. Witnesses filmed a team-mate, reported to be flanker Carl Fearns, who is 6ft 3in and 18st, squaring up to Henson before striking him in the face. 

Aplon was unfortunate to be on the end of a clumsy Rynhardt Elstadt elbow midway through the first half as he flew into a tackle situation unaware that his left arm would produce a knockout blow.

O'Connell lost his nerve with the Ulster second-row in the build-up to the 2011 Rugby World Cup. The Munster legend threw a punch and he went down, unconscious with a tooth bursting his cheek. Caldwell swallowed a lot of blood and an ambulance had to rush him to the hospital. The team doctor later told O'Connell: "The story is, you nearly killed him.”

On a chip and chase, down the left flank, Hogg ran straight into the raised elbow of the retreating Conor Murray. The collision left him dazed and with blood pouring from a gash above his right eye. Accidental but very much a K.O. The Scotland fullback received treatment on the pitch before being escorted off and replaced by Anthony Watson.

In 2008, Cipriani was baited by Josh Lewsey for not putting enough effort in. Reports claim the fly-half then retaliated by telling Lewsey to "shut up or be shut up". Next thing the then 20-year-old knew he was lying on his back staring up at the sky with a fat lip.

Moody’s desire to impress on his return after injury in 2004 caused a flare-up with the then Tigers captain Martin Johnson.

“It was my first session and I was extra keen, trying to do everything and hit everything,” Moody told The Sun.

“Tempers flared and ‘Johnno’ and I had a little coming together. He gave me a little dink and I gave him a little dink – but his hurt a lot more!

“It’s just typical training ground stuff. You need that friendly rivalry.”