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In the viewing room at 30 Rock, only a couple of pregame features make the various on-air personalities (e.g., Dan Patrick, Rodney Harrison, Tony Dungy), producers, veteran reporters (i.e., Peter King), and Internet hacks (i.e., me) stop and pay attention.

One of those moments comes when Frank Caliendo does his thing on FOX.

Unfortunately, Caliendo won’t be doing his thing on FOX any more.

The comedian has announced on his Twitter and Facebook pages that he won’t return in 2012.

“I will not be back this coming season,” Caliendo said via Facebook. “It was great to be part of the team with Terry and the guys for the last 9 years, but it’s time to move on. I have a couple of upcoming ventures that look like they may be pretty cool. . . . And as soon as I can tell you more about them — I definitely will.”

Though Caliendo’s range of characters is fairly narrow and in some respects outdated (e.g., George Bush), he’s hilarious.

It’s unknown whether FOX will try to replace him. It won’t be easy.