Here are our Top 15 Best Pound for Pound fighters in all of boxing. In our opinion, these are the 15 baddest men in gloves. You’ve seen boxing betting odds and know these dudes are perennial faves… but what’s going to happen if #1 fights #2? Check our rankings and comment below to tell us what you think.

1. Manny Pacquiao, 51-3-2 (38 KOs): Seven-division titleholder, spanning from flyweight (112 lbs.) to welterweight (147 lbs.) He has lost only once since 1999, against Erik Morales—a man he has since knocked out twice. Recently knocked out De La Hoya, Ricky Hatton, and Miguel Cotto in captivating fashion.

2. Floyd Mayweather, Jr., 41-0 (25 KOs): Could be the best, but is hurt by having only 2 fights in the last 30 months. Those two wins, however, were absolute Mayweather clinics, as he beat Lightweight Champion Juan Manuel Marquez and Welterweight Champion Shane Mosley while losing 1 out of 24 rounds.

3. Paul Williams, 39-1 (28 KOs): At 6’2” and an 82” wingspan, this southpaw can fight anywhere from welterweight to super middleweight. Williams smothers his opponents with punches. He is tough, durable, and beginning to build a nice little resume, including wins over Antonio Margarito and current Middleweight Champion Sergio Martinez.

4. Juan Manuel Marquez, 50-5-1 (37 KOs): Getting up there at 36, but his loss to Mayweather in September was first clear-cut loss of his 17-year career. Held number-one Manny Pacquiao to a draw and a split decision in their two fights. Will next fight Juan Diaz in a July rematch of their sizzling 2009 bout.

5. Sergio Martinez, 45-2-2 (24 KOs): Operated anonymously for years, but has capitalized on some big fights recently, culminating in a huge win over Middleweight Champion Kelly Pavlik in April. Slick, gutsy, and intelligent, Martinez is always in exciting fights.

6. Shane Mosley, 46-6 (39 KOs): He didn’t look so great against Mayweather and will need to notch a significant win relatively soon to stay on this list. His incredible body of work, some recent, just makes it hard to put younger fighters with more potential above him at this point.

7. Pongsaklek Wonjongkam, 75-3-1 (39 KOs): This Thai champion might be unknown to western fans, but he might be one of the greatest flyweights of all time. Has one loss in his last 70+ fights, against a man he beat multiple times. His epic March win over Koki Kameda reestablished his number-one status in the division, a position he first claimed almost a decade ago.

8. Chad Dawson, 29-0 (17 KOs): Along with Paul Williams, Dawson represents the only young blood on this list. The 27-year old Dawson holds two wins over both Roy Jones-conquerors Glen Johnson and Antonio Tarver, and his 2007 win over streaking Tomasz Adamek is looking better all the time. The tall, stylish boxer next fights talented Jean Pascal in a unification fight.

9. Bernard Hopkins, 51-5-1 (32 KOs): At 45, Hopkins might be the oldest ever member of the pound-for-pound top ten. Sure, he seems content to pick his spots and probably should give Chad Dawson a shot, but has he not earned the right to be selective? Since 2006, he has beaten Antonio Tarver, Winky Wright, Kelly Pavlik, and Roy Jones—not a a bad list of recent work.

10. Ivan Calderon, 33-0-1 (6 KOs): Diminutive (5’0”) Puerto Rican junior flyweight is undefeated in 18 title bouts at 105 and 108 pounds. The smooth-boxing southpaw can’t crack an egg, but his skill, craft, and ring IQ are top-notch. At 35, it might be time for him to aim for big fights while he can still make it happen.

11. Fernando Montiel, 41-2-2 (31 KOs): Recent knockout over highly regarded bantamweight champion Hozumi Hasegawa was stunning—the signature win of a great career. Montiel has a decade of success at the world-class under his belt, including titles in 3 weight classes.

12. Wladimir Klitschko, 54-3 (48 KOs): Not the most memorable heavyweight champ, but he hasn’t loss in 6 years and has beat whoever they put in front of him. His contenders have been mediocre, but Wladimir has been dominant, knocking out 8 of his last 9 challengers.

13. Celestino Caballero, 34-2 (23 KOs): String bean (5’11”) featherweight was dominant at 122 and now looks to take on the best in the stacked 126 lb. class. Despite alarming height and reach advantage, the Panamanian likes to mix it up and is a hurtful body-puncher.

14. Timothy Bradley, 25-0 (11 KOs): Exciting and energetic, this hard-charging punching machine has hustled his way to the top of the heap in the deep junior welterweight class. Looks to possibly get a fight with Pacquiao or Mayweather, where he would be a considerable underdog, but also a live one.

15. Lucian Bute, 26-0 (21 KOs): The Romanian-born Montreal resident is capable of smooth boxing and hard punching. Stopped his last two opponents, Librado Andrade and Edison Miranda, with sudden one-punch knockouts.

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2. Floyd Mayweather vs. Shane Mosley Fight Preview and Prediction
3. Manny Pacquiao vs. Joshua Clottey – Fight Preview, Odds & Prediction
4. Chad Dawson vs. Jean Pascal Fight Preview and Prediction
5. Floyd Mayweather Jr vs. Shane Mosley Betting Options & Preview