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Dana White has opted not to speak with the recently retired light heavyweight fighter Stephan Bonnar since the fighter's positive test results were revealed.

Recently retired light heavyweight Stephan Bonnar and heavyweight Dave Herman failed their respective UFC 153 postfight drug tests, a source told ESPN.com on Friday.

Former UFC light heavyweight champion Quinton Jackson has asked promotion president Dana White for a bout with highly touted Glover Teixeira. Jackson made his request Sunday, several hours after Teixeira called him out at UFC 153 in Rio de Janeiro...

As expected, middleweight champion Anderson Silva had no difficulty making the 205-pound limit Friday for his bout at UFC 153.

Former UFC light heavyweight champion Rashad Evans revealed Sunday that he turned down an offer to fight highly touted Glover Teixeira at UFC 153 on Oct. 13 in Rio de Janeiro.

Conventional wisdom suggests that Stephan Bonnar, who last fought in November 2011 and spent the past few months contemplating retirement, has nothing to lose against middleweight champion Anderson Silva at UFC 153. There's no title on the line, t...

Jose Aldo out of main event at UFC due to foot injury.

An undisclosed injury has forced former light heavyweight champion Quinton 'Rampage' Jackson out of his Oct. 13 bout against Glover Teixeira, UFC president Dana White announced on Tuesday.

UFC featherweight champion Jose Aldo suffered a swollen foot and several scratches Saturday when a car hit the motorcycle he was riding in the Copacabana section of Rio de Janeiro.

Fast-rising welterweight Erick Silva faces potentially his stiffest test Oct. 13 when he meets perennial contender Jon Fitch at UFC 153 in Rio de Janeiro, Brazil, the promotion announced Tuesday night.

Former light heavyweight champion Quinton Jackson will face highly touted Glover Teixeira at UFC 153, a source close to the situation confirmed with ESPN.com on Monday.