Nam Phan to take on Dennis Siver

Updated: November 14, 2012, 7:05 PM ET

Nam Phan has replaced injured featherweight Eddie Yagin and will face Dennis Siver at a UFC on Fox event on Dec. 8 in Seattle.

Yagin withdrew from the bout on Tuesday after suffering a head injury in training. Phan quickly asked for the short-notice fight via his Twitter feed. UFC officials announced the matchup Wednesday.

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Phan (18-10) is coming off a split-decision victory over Cole Miller on a UFC on Fox card in August. The California resident is 2-3 since joining the UFC in 2010, following an appearance on "The Ultimate Fighter" reality series.

Siver (20-8) will look to continue his success at featherweight after dropping from the 155-pound division earlier this year. ESPN.com already ranks the 33-year-old the No. 6 fighter in the division.

He posted a unanimous decision win over Diego Nunes at a UFC on Fuel card in April.

The featherweight bout will take place on the preliminary portion of the UFC on Fox card. A lightweight title fight between Ben Henderson and Nate Diaz is scheduled to headline.