While with the Braves, he gained notice for his weight problem. The 6'3" Forster reportedly weighed 270 pounds while with Atlanta. David Letterman gave the left-hander national notoriety in 1985, when he referred to the lefty as a "fat tub of goo" on his "Late Night" show. Forster later appeared as a guest on Letterman's show following the comments; he ate a sandwich as he entered the set after Letterman introduced him. He also recorded a novelty song called "Fat Is In".