Jason House of Iridium Sports Agency, who represents Ultimate Fighting Championship (UFC) Featherweight fighter, Eddie Yagin (16-5-1), shared some troubling news Monday evening (Nov. 12, 2012).

Check out his cryptic Tweet below:

"Please keep @EddieYaginMMA in your prayers. He got admitted to the ER today due to a head injury he suffered training."

The details surrounding the incident are unknown at this time, however, it can only be assumed that Yagin's bout with Dennis Siver, which is scheduled for UFC on FOX 5 on Dec. 8, 2012, in Seattle, Wash., is in jeopardy.

Yagin trains at Aliance MMA in San Diego, Calif., alongside UFC veterans Brandon Vera, Dominick Cruz and Alexander Gustafsson, among others. He last fought at UFC 145 in April 2012, defeating Mark Hominick via split decision. "The Filipino Phenom" is even (1-1) under the UFC banner.

Head injuries are a serious situation. And with little more than three weeks until the event, the chances of the 33-year-old competing look grim at the moment.

Stay tuned to MMAmania.com for future updates on Yagin's condition and the status of his upcoming fight with the German-built fire hydrant.