The welterweight division is the most competitive in boxing; these formidable fighters loom as challengers to the winner of the Mayweather-Baldomir bout.
Antonio Margarito—The WBO champ is arguably the most feared fighter in the division; the 28-year-old native of Mexico has won his last six fights by knockout.
Zab Judah—Back-to-back losses to Baldomir and Mayweather cost him credibility; losing his cool cost him his license. The Nevada boxing commission suspended Judah, 29, for a year for his role in a melee during his Mayweather bout last April.
Kermit Cintron—The newly crowned IBF champ has bounced back from a brutal 2005 loss to Margarito. One of the most physical fighters in all of boxing, Cintron, 27, has KO'd opponents in 25 of his 27 wins.
Paul Williams—The rangy (6'1") Williams, 25, is the No. 1 challenger for the WBO title; the Punisher has won 23 of his 31 fights by KO.