1 Mike Tyson
He will come to you in your dreams and... BITE OFF YOUR EAR MUAHAHAHAHAHAH! XD - fireinside96
Pre-90's Tyson was the most feared fighter in the world, and arguably the greatest heavyweight ever.
after the stuff he's actually done, we still have no idea what he's thought about and not done - danajs24
Best in his prime against anyone, ever.
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2 Brock Lesnar
Brock Edward Lesnar is an American professional wrestler and former amateur wrestler, professional American football player, and mixed martial artist who is currently signed to WWE.
The sheer size and physique of this monster of a man has got to strike fear in any one that would face him!
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3 Dennis Rodman
when I saw him in that wedding dress, it about scared me half to death! lol. - jwileson
He beats up referees
That's got to count for something - Itsshoopermanngavin
U see the face right
4 Kimbo Slice
Kevin Ferguson, better known as Kimbo Slice, was a Bahamian-born American mixed martial artist, boxer and occasional actor.
5 Jack Lambert
6 Shaquille O'Neal
Shaquille Rashaun O'Neal, nicknamed Shaq, is a retired American professional basketball player who is currently an analyst on the television program Inside the NBA.
I know. His rapping is the most terrifying thing on Earth. - Mrveteran
He is big
He is tall
7 Ray Lewis
Raymond Anthony Lewis Jr. is a former American football linebacker who played his entire 17-year career for the Baltimore Ravens of the National Football League.
Ray Lewis killed two people, how is that not scary?
Like a brick wall coming at you at 200 mph and you know you gonna fumble the ball
8 Lawrence Taylor
9 Randy Johnson
have you seen this mans face!? - KMS0694
10 Mike Singletary
11 Michael Vick
Michael Dwayne Vick is an American football quarterback who is a free agent. He has previously played for the Atlanta Falcons, Philadelphia Eagles, New York Jets and Pittsburgh Steelers.
Dogs are definitely scared of him. - Mrveteran
12 Dick Butkus
Mr Butkus KICKED a 68-yard FIELD GOAL... with that CLUB FOOT of HIS.. HEROs are HE-!
BIGEST HITS EVER
13 Troy Polamalu
Troy Aumua Polamalu is a former American football strong safety who played his entire twelve-year career for the Pittsburgh Steelers of the National Football League.
14 Michael Jordan
Michael Jeffrey Jordan, also known by his initials, MJ, is an American retired professional basketball player.
Because nobody can beat him
Cause he could beat u
15 Mean Joe Greene
16 Muhammad Ali
Muhammad Ali (January 17th 1942 - June 3rd 2016) was an American former professional boxer . He was generally considered among the greatest heavyweights in the history of the sport. V 1 Comment
17 O.J. Simpson
Dude murdered two people
Should be number one
18 Keith Bulluck
19 Leonard Davis
I Cant Beleave No One Put Leonard Up Brock Lesnar Aint Scary
20 Kobe Bryant
Kobe Bean Bryant is an American retired professional basketball player. He played his entire 20-year career with the Los Angeles Lakers of the National Basketball Association. Kobe Bryant has won 5 NBA championships with the Lakers and is the all-time leading scorer in Lakers franchise history.