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Six months after they were first scheduled to meet, featherweight titleholder Jesus Cuellar and Abner Mares will finally fight in the main event of a world title doubleheader that will also mark promoter Richard Schaefers first event in 2? years.Cuellar-Mares, along with the co-feature of junior middleweight titleholder Jermall Charlo in a mandatory defense against Julian J Rock Williams, will take place on Dec. 10 (Showtime) at the Galen Center, which is on the campus of USC in Los Angeles, Schaefer said.These are two 50-50 fights and they not only are stylistically great fights, but you cant imagine either being a boring fight, Schaefer said on Sunday night. Both of them are important in their respective weight classes.Schaefer has not promoted a boxing card since he spearheaded Floyd Mayweathers first fight against Marcos Maidana in May 2014 as CEO of Golden Boy Promotions, which Schaefer co-founded with Oscar De La Hoya in 2002. But a month after Mayweather-Maidana I, Schaefer resigned in the final step of his bad falling out with De La Hoya over the direction of the company. Per his contract, Schaefer had to sit out for about a year, but he took things slowly before announcing the creation of his new company, Ringstar Sports, in June.Ive been waiting for this for a long time, Schaefer said. Im happy to come back with an event like this. Im excited to be putting [together] great events again. I like to create events, big cards, big events, stacked pay-per-views. Fight fans and fight freaks can look forward to more to come.Im excited to have this kind of card for Ringstar and looking forward to co-promoting it with Tom Brown (of TGB Promotions). Its my first time working with him on a card.Cuellar and Mares were initially scheduled to square off on June 25 in New York, but Mares failed his pre-fight eye exam and the New York State Athletic Commission would not license him because his uncorrected vision did not meet the states minimum standard of 20/200. Mares had surgery for a detached retina in 2008, but he has reported no problems with his eye since.Schaefer, who promoted Mares for years when they were both with Golden Boy, said he wanted to be reassured about the health of Mares eye before he agreed to put on Cuellar-Mares. Schaefer said he spoke to the fighter and his wife, his doctor and the California State Athletic Commission.I wanted to make sure Abner is OK, and I sat down with him and his wife and wanted to hear directly from him that he was fit to fight, Schaefer said. I wanted to hear from his own mouth there is no issues with his eyes. But I think if you ask a fighter if theyre OK, more often than not theyll tell you they are, so I also wanted to talk to his doctor.Schaefer said he spoke to Dr. Steven Steinschriber, a renowned Los Angeles-based ophthalmologist.I talked to him and he made it clear to me Abner is clear to fight, Schaefer said. I talked to fighter and the doctor and the commission and Abner is clear to fight, and not only clear to fight but safe to fight, so we made the fight. Im very excited to see the fight because they are both entertaineers, and I know theyll give us a great show.ddddddddddddCuellar (29-1, 21 KOs), 29, of Argentina, will be making the third defense of his secondary title and ending a one-year layoff since a unanimous decision against Jonathan Oquendo last December.Los Angeles-based Mexico native Mares (29-2-1, 15 KOs), who turns 31 next month, is a former featherweight, junior featherweight and bantamweight world titleholder. He has not fought since August 2015, when he dropped a majority decision to L.A. rival Leo Santa Cruz at Staples Center in an action-packed fight for a vacant featherweight belt.Charlo-Williams was initially being planned for early October, but the fight was delayed because Charlo received a 60-day medical exception to his mandatory in order to have a LASIK procedure on his eyes to improve his vision in July.Charlo (24-0, 18 KOs), 26, of Houston, whose twin brother Jermell also holds a 154-pound world title, will be making his third defense since winning it in September 2015.Williams (22-0-1, 14 KOs), 26, of Philadelphia, became the mandatory challenger by virtue of a seventh-round knockout of Italys Marcello Matano in a title eliminator in March.Its a fight which has been asked for by fight fans, Schaefer said. Its one of the best fights you can make in the division. I expect fireworks. Sometimes with mandatories you are stuck with a fight nobody wants to see, but in this case, its a fight everyone wants to see.The card will be the second in Galen Center history and first since May 2014, when it hosted Bermane Stivernes sixth-round knockout of Chris Arreola to win a vacant heavyweight world title on ESPN. Schaefer, a Switzerland native who has lived for many years in Los Angeles, said his goal when he founded Ringstar was to have his first event in his adopted hometown.I wanted to do my first event as a meaningful event where its a great card to be proud of, and I really wanted it to be in Los Angeles, he said. When this card was shaping up, I threw my hat in the ring and talked to Al (Haymon, adviser to all four featured fighters). I said this is an event Id like to be involved with, and thats how it happened. Im especially excited to be doing the card on the USC campus because thats where two of my (three) boys go to college.Also on the card, in a fight ticketed for the Showtime Extreme coverage of preliminary bouts, Australias Lenny Zappavigna (35-2, 25 KOs), 28, and Los Angeles-based Russian up-and-comer Sergey Lipinets (10-0, 8 KOs), 27, will meet in a world title elimination bout. The winner will become the mandatory challenger for Russian world titleholder Eduard Troyanovsky (25-0, 22 KOs).Zappavinga was initially ordered to face Rances Barthelemy, a former lightweight titleholder who vacated to move up in weight. However, Barthelemy took himself out of position because he was not available due to family reasons. That opened the door for Lipinets, and Brown and Carl Moretti of Top Rank, Zappavignas promoter, quickly made a deal. ' ' '