ESPN just sent out an email saying Tony Kornheiser has left the MNF booth and is being replaced by Jon Gruden.

From the press release:

Former Super Bowl-winning head coach Jon Gruden is joining ESPN’s Monday Night Football. The dynamic, outspoken and often fiery Gruden will join commentators Mike Tirico and Ron Jaworski in the booth when sports television’s signature series kicks off its 40th season this fall. Gruden will also contribute analysis throughout the year on ESPN Radio and other platforms, in addition to being a part of ESPN’s 2010 Pro Bowl telecast and Super Bowl and NFL Draft coverage.

Gruden replaces Tony Kornheiser, who has decided to step down after three years in the Monday Night Football booth.

“I would like to thank Tony Kornheiser for his many contributions to Monday Night Football the past three years,” said John Skipper, ESPN executive vice president, content. “He has been a big reason for the show’s success on ESPN. Pardon the Interruption is one of ESPN’s most important franchises and fans will continue to see Tony on the show and involved in other future ESPN projects for many years to come.€

Kornheiser added: “I am totally grateful for the MNF opportunity that I truly enjoyed the last three seasons. I feel we got better each year. My fear of planes is legendary and sadly true. When I looked at the upcoming schedule it was the perfect storm that would’ve frequently moved me from the bus to the air. I kept looking at the schedule the past month and wanted to find a way to quietly extricate myself. If I could handpick a replacement of a football guy, I would cast a net and drag in Jon Gruden. He is the two things you most want — smart and funny — and has the two things I don’t — good hair and a tan. I love PTI and am looking forward to continuing to yammer and yodel with Wilbon until the end of time.€

Kornheiser is playing in Ron Jaworski’s charity golf tournament in Atlantic City, and as much as we’d like to drive down and get a word with him in the parking lot, we’ll have to hope that he checks his Washington Post messages and returns our calls (yeah, right). We’ve sat on a TK-MNF angle for a long time (because it’s mostly speculation), but if he calls back, we’ll ask him about it.