Late Thursday night, UFC welterweight Mike Swick announced a knee injury will postpone his long-awaited Octagon return. Swick was slated to face Erick Silva at “UFC 134: Silva vs. Okami” on August 27th.

“Yes rumors are true. I tore my knee today wrestling. Will get MRI results in am but Dr thinks torn MCL, ACL and possibly meniscus,” Swick tweeted. “Got my health and size back and was having best fight camp of my career then one small twist during training. Can’t catch a break sometimes.

“Really was excited about this fight. Don’t really have anything else to say I guess. Sorry guys thanks for the support.”

Swick was last seen posting his second consecutive loss in February of 2010. He was subsequently misdiagnosed with a stomach ailment and has been riding the pine ever since. He was planning to return at “UFC Fight for the Troops 2” this last January, but opponent David Mitchell had to withdraw due to an injury.

According to the UFC, a replacement opponent for Silva will be announced shortly.

“UFC 134: Silva vs. Okami” takes place inside the HSBC Arena in Rio de Janeiro, Brazil. A middleweight title tilt between champion Anderson Silva and Yushin Okami will headline the pay-per-view broadcast.

Here are the athletes expected to appear in the show:

Preliminary Bouts:

Raphael Assuncao vs. Johnny Eduardo

Yves Jabouin vs. Ian Loveland

Felipe Arantes vs. Yuri Alcantara

Dan Miller vs. Rousimar Palhares

Paulo Thiago vs. David Mitchell

(Spike TV 8PM ET/5PM PT)

Erick Silva vs. TBD

Spencer Fisher vs. Thiago Tavares

Main Bouts:

(Pay-Per-View 9PM ET/6PM PT)

Stanislav Nedkov vs. Luiz Cane

Ross Pearson vs. Edson Barboza

Brendan Schaub vs. Antonio Rodrigo Nogueira

Mauricio “Shogun” Rua vs. Forrest Griffin

Yushin Okami vs. Anderson Silva (UFC Middleweight Champion)