(taken from an interview)

...there was an old local grocery store commercial, and we live in Atlanta, and it advertised the Atlanta Braves. It was like, “the Atlanta Braves hit home runs, and you can hit a home run with savings here!” And so there was this player named Mark Lemke, and they said something like “All star second baseman for the Braves.” And our friend knows nothing about sports, and so he would always do his old timey radio impression of this guy, and not knowing any positions in baseball or whatever, he’d just be like, “Homestar Runner for the Braves.” And we were just like, “Homestar Runner? That’s the best thing we’ve ever heard!”

Interesting Information:

When you go to Main Menu 14 and let the shower get all fogged up, the word "LEMKE" will appear.

Also, in the Homestar Runner Theme Song you see Pom Pom and Homestar crack open a couple of cold ones in a nondescript room that has a pennant on the wall with, you guessed it, LEMKE.

In "Everybody To The Limit", when the words "come on" flash on the Visor Robot, just before the scene changes, "come on" changes to "lemke".

Mark Lemke was a regular for the Braves from 1990 through 1997 and no longer plays in the majors. According to MLB's website, he was never an all-star.

I've seen a car with a license plate that says "LEMKE". -Shopiom