Eye injury costs Mares bout on Pavlik-Hopkins undercard

A week before rising bantamweight contender Abner Mares was supposed to be featured on the Kelly Pavlik-Bernard Hopkins undercard, an eye injury has forced him to be scratched from his fight.

Mares, a 2004 Mexican Olympian, was scheduled to face former junior bantamweight title challenger Luis Melendez (25-3-1, 20 KOs) in a scheduled 12-round defense of his regional 118-pound title next Saturday night in Atlantic City, N.J. However, Mares suffered a torn retina during training this week and underwent surgery, Golden Boy Promotions vice president and matchmaker Eric Gomez said.

With the Mares bout off, 21-year-old New York middleweight prospect Daniel Jacobs (10-0, 9 KOs) will be moved up to the televised portion of the card against an opponent to be determined in a six-round bout.

Jacobs was originally scheduled to face Jimmy Campbell (11-2, 8 KOs) of Indianapolis off television. But Campbell has been stopped inside four rounds in two of his last three bouts and they felt Jacobs needed a stiffer test for a fight that would be on television.

Gomez added that if Jacobs comes through, he would likely next fight at New York's Madison Square Garden on the Nov. 8 Joe Calzaghe-Roy Jones undercard.

Mares (17-0, 10 KOs), 22, who lives in Southern California, has been on the fast track since turning pro and has a title shot in his future if he recovers from the injury. He is the mandatory challenger for titleholder Gerry Penalosa of the Philippines.

The rest of next Saturday's undercard includes Steven Luevano defending his featherweight belt against Australia's Billy Dib and Mexican middleweights Marco Antonio Rubio and Enrique Ornelas squaring off in a title eliminator.

Dan Rafael is the boxing writer for ESPN.com.