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20. A-Rod's Ego

alex rodriguez
Nick Turchiaro-USA TODAY Sports

Alex Rodriguez himself isn't scary, but his ego is as frightful as they come. This guy must think he's better than the world, acting like we don't think he too PEDs.

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19. Calvin Johnson

johnson
Geoff Burke-USA TODAY Sports

Would you want to line up against a receiver with the nickname "Megatron"? I didn't think so. This guy is the best wide out in the NFL and he has the opportunity to be the best ever. Oh yeah, and he scares every cornerback he comes into contact with.

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18. Aroldis Chapman

chapman
Daniel Shirey-USA TODAY Sports

I would put Mariano Rivera on this list, but the fear that overcomes players is not nearly as overwhelming anymore for the now-retired Sandman. However, Chapman has become the most feared reliever out there, throwing bullets out of the bullpen that can get up to 102-103 mph.

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17. Nick Mangold

mangold
Matt Kryger-USA TODAY Sports

Besides being one of the best centers in the NFL, Mangold looks like he could break you in half.

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16. Miguel Cabrera

cabrera
Andrew Weber-USA TODAY Sports

Cabrera is the best hitter in the world and who wants to pitch to the former Triple Crown winner with the game on the line? No one. This guy can hit it out of the park with ease. I think pitchers have nightmares about the third baseman.

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15. LeBron James

james
Derick E. Hingle-USA TODAY Sports

LeBron could be one of those once-in-a-generation type of players. He is a physical beast that can dunk on anyone, anywhere, any time -- unless, of course, it's the dunk contest.

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14. Troy Polamalu

polamalu
Joe Camporeale-USA TODAY Sports

Just watch the hit below and tell me you're not scared of him.

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13. Marshawn Lynch

lynch
Joe Nicholson-USA TODAY Sports

It's pretty safe to say that no one wants to tackle this guy. He is a pure beast. Don't even tell me that you wouldn't be scared if he was running full-speed at you.

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12. Metta World Peace

world peace
Jayne Kamin-Oncea-USA TODAY Sports

This guy has beaten up fans. That just means no one is safe.

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11. Joakim Noah

noah
Robert Mayer-USA TODAY Sports

Best defender in the league means no one wants to attack the basket with him standing there. The guy is just a monster in the paint.

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10. James Harrison

harrison
Andrew Weber-USA TODAY Sports

If there's one guy in the NFL who has been known for his hard hits, it has to be James Harrison. There are a handful of notable smacks that Harrison has placed on opponents that just make you cringe. Here's a video of a few of them.

WARNING: the song in this video contains some profanity.

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9. Jadeveon Clowney

clowney
Kim Klement-USA TODAY Sports

Clowney has to be the most feared player in college football no matter how unsuccessful he has been in his junior season. Lack of stats will happen when you are getting double-teamed every play. Oh yeah, and he has his own "the freak" commercial that portrays him as a nightmare to opponents.

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8. Clay Matthews

matthews
Jeff Hanisch-USA TODAY Sports

Clay Matthews is a defensive juggernaut and a guy with a high motor that can lay the lumber with relative ease. Try running at this guy and not chickening out at the last second. Can't do it.

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7. Ndamukong Suh

suh
Matt Kartozian-USA TODAY Sports

Ndamukong Suh has been known for applying dirty hits on opponents. For that reason alone, you should be afraid to look at him the wrong way because he might stomp on you.

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6. Zdeno Chara

chara
Michael Ivins-USA TODAY Sports

Chara is the one guy you want on your side because he is a physical giant of a man. Chara's hits can give you a concussion while just watching on TV.

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5. J.J. Watt

watt
Matthew Emmons-USA TODAY Sports

Watt is one guy on defense that you would not want to face as an offensive lineman. This guy can get hit so hard that he requires stitches and still stay in the game. For that, he is scary.

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4. Floyd Mayweather

mayweather
Jayne Kamin-Oncea-USA TODAY Sports

Pound for pound, he is the best fighter in the world. Stepping in the ring with Mayweather is almost an immediate death sentence.

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3. Cain Velasquez

velasquez
Andrew Richardson-USA TODAY Sports

Watching Velasquez beat up on opponents almost brings a chill to your spine. Steer clear of this guy.

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2. Ray Lewis

lewis
John David Mercer-USA TODAY Sports

It's been rumored that Ray Lewis once hit a guy so hard, he quit the game of football. Okay, that might not be true, but the legend of Lewis' ferocity lives on even after he's retired. He might go down as the most feared linebacker in the history of the game.

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1. Mike Tyson

tyson
Joe Camporeale-USA TODAY Sports

Well, let's just say he might dig his teeth into you and take off a limb or two. Tyson is probably the most feared fighter on the planet right now even though he's retired. I can't imagine anyone would want a piece of him.


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