Rugby!
Scott Stevens
alex kovalev
Hardy Brown
sunny kooner
problaby troy polamolu or bob sanders
I would have to say nhl cause you are always moving and hitting other people at high speed
Ted Williams was quoted several times as saying hitting a baseball was the single most difficult thing to do in sports.
The hardest official shot in the NHL was registered by Zdeno Chara at the recent all-star skills competition when he had a shot of 105.4 MPH.
Kicker of course. Kicker makes car audio products, not home theater subs. The term 'hardest hitting' isn't a measurable quantity. For the sub with the most power, try the Tannoy TS212iDP, a subwoofer with 1500 Watts and 2 12" drivers.
Yes and no. Billy Coutu was the first player to receive a lifetime suspension from the NHL. That suspension was for slugging a referee, not a coach.
Definitely line-backer wise it's either Ray Lewis or Patrick Willis.