TBS host Casey Stern drops f-bomb on broadcast after Mets beat Cubs (VIDEO)

The MLB postseason is a good reason to get fired up, but TBS host Casey Stern may want to water down the coffee in those giant network cups while working the broadcasts.

As TBS cut to a commercial on its postgame show, the mic picked up Stern shouting, “boom, motherf***ing...” during a cutaway.

Stern apologized for the naughty language when they returned from the commercial.

Casey Stern apologizing for F Bomb. pic.twitter.com/NUixljtUUc

— Fred @ KrustySox com (@greatmonkeysuit) October 18, 2015

But who knew the bookish looking Stern had a little Samuel L. Jackson in him?

Cover your ears kids.