The days of heavyweights dominating boxing appear to be over, or at least in the past.

Rivals like Muhammad Ali, George Foreman and Joe Frazier don't just don't come around very often, and the Mike Tyson era is over, for better or worse.

With middleweights like Floyd Mayweather Jr. and Manny Pacquiao attracting so many views and high ratings, more and more attention is now on the smaller fighters. Unfortunately, we have yet to see a Mayweather-Pacquiao bout, but 2015 looks to be a promising year.

The top five fighters in the Welterweight division have no fights scheduled for 2015:

1. Floyd Mayweather Jr.

Mayweather still has an unblemished record of 47-0 after defeating Marcos Maidana in his last two fights. Maidana wasn't the fighter that fans wanted to see Mayweather face, but that's what they got for 2014. With Pacquiao coming off a strong victory over Chris Algieri, the pressure is higher than ever to fight him. Mayweather is 37 years old, and time is running out for the WBA Champion to add another notable victory to his legacy. Mayweather isn't the strongest puncher or in the prime of his career, but his speed and athleticism is still elite.

2. Manny Pacquiao

The 35-year-old Filipino silenced his critics in China with a convincing victory against Algieri on Nov. 23. Although Pacquiao didn't get a knockout, he still knocked Algieri down six times in the match. Pacquiao has been calling for Mayweather to fight him since 2008, but we've yet to see the two face each other even once. Many people believe that because Pacquiao is a lefty, he would have an advantage if he faced Mayweather. Pacquiao is the current WBO Welterweight Champion of the world and he was named "Fighter of the Decade" for his performances from 2000-2009.

3. Timothy Bradley

Bradley gets criticized for not being able to attract big fights and high ratings, but he is the No. 3 ranked boxer in the Welterweight division. The only loss on Bradley's resumé was to Pacquiao back in April of this year. Bradley did defeat Pacquiao in 2012, but that split decision ruling was very controversial. Bradley isn't the biggest, strongest or the quickest, but he is an all-around good boxer with high endurance. Bradley's next fight will be against Argentinean Diego Gabriel Chaves on Dec. 13.

4. Juan Manuel Marquez

Marquez has a 56-7-1 career record, the second most career victories in the Welterweight division only behind Pacquiao, who has 57. Marquez has experienced a great career with a knockout against Pacquiao. The 41-year-old Mexican still has a strong right hand, and is capable of dropping anyone if he connects. Marquez has already faced Bradley, Mayweather and Pacquiao, so his next opponent will be an interesting one.

5. Keith Thurman

Keith "One Time" Thurman (shown above) faces Leonard Bundu on Dec. 13 in Las Vegas. Thurman is an extremely hard hitting boxer who can knock anyone out if given the opportunity. In his young career, Thurman is a perfect 23-0 with 21 knockouts. Not many people want to get in the ring with this guy. Even though Thurman is just 23 years old, his 2015 calendar could be filled with a fight against Mayweather or Pacquiao. With Mayweather and Pacquiao both nearing the end of their careers, Thurman could be the future of middleweight boxing.

With the top five boxers in the Welterweight division all having no fights scheduled for 2015, boxing fans could be in for a terrific year.

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