Carroll is an unabashed fan of rugby 's tackling technique .
After guiding Seattle to the Super Bowl in 2014 , fan released a 20 - minute video with footage of NFL and rugby spliced together to explain fan 's 's philosophy .
Carroll is an unabashed fan of rugby 's tackling technique and after guiding Seattle to the Super Bowl in 2014 , he released a 20 - minute video with footage of NFL and rugby spliced together to explain his philosophy .