Breuer's career began on the little-known Uptown Comedy Club weekly television show, based in Harlem, New York. He then joined the cast of Saturday Night Live from 1995 to 1998. On SNL, Breuer's characters included "Goat Boy" (who hosted the fictional MTV program "Hey, Remember the 80s?") and Glen Henderson, the elder brother to Chris Kattan's Todd Henderson/Azrael Abyss character in the "Goth Talk" skits. He has previously guest starred in Home Improvement. That appearance gave way to the short-lived sitcom Buddies. He was originally scheduled to have been the co-star alongside friend and co-worker Dave Chappelle, but was pulled from the role after filming the pilot.