By Edward Chaykovsky

Lightweight contender Mickey Bey (20-1-1, 10KOs) is tabbed as the big underdog as the biggest fight of his career approaches. Mayweather Promotions CEO, Leonard Ellerbe, has no doubt that Bey is going to upset IBF champion Miguel Vazquez (34-3, 13KOs) on Saturday night at the MGM Grand in Las Vegas.

The fight is part of the Showtime Pay-Per-View undercard to the Mayweather-Maidana rematch.

Bey has picked up two wins since suffering his first career defeat last July, when John Molina came from behind to score a TKO win in the tenth and final round.

"I believe that Mickey Bey will emerge victorious Saturday night. He's worked very hard to get here and been through a lot of ups and downs in his career," Ellerbe said.

"Mickey Bey knows that he has a very tough opponent in Miguel Vazquez who comes into this fight on a 13-match winning streak dating all the way back to his 2008 loss against a terrific fighter in Canelo Alvarez."