Groh co-starred in the sitcom Rhoda in which he played Joe Gerard, a New York City building demolition company owner who met and married Rhoda Morgenstern, the best friend of Mary Richards from CBS's The Mary Tyler Moore Show. The show premiered September 9, 1974 and Joe and Rhoda married in the seventh episode. The network gave the marriage much advance publicity, and the episode proved a ratings blockbuster, having drawn some 50 million viewers to become one of television's most-watched single episodes. In season three, the couple separated and later divorced. Groh was dropped to recurring status during season three, and he made only a few guest appearances the following season, before being written out of the show entirely. According to Valerie Harper, Groh was written out of the show when the producers decided that Rhoda worked better with its star as a single woman. "We all felt very bad about David not continuing," she said. The two remained lifelong friends. However, this change was not embraced by the show's audience and ratings began to decline sharply. Rhoda was eventually canceled in the fall of 1978. Groh starred in his own series, the short-lived Another Day, and went on to make his Broadway theatre debut in Neil Simon's Chapter Two. From 1983 to 1985, Groh played D.L. Brock in the ABC soap operaGeneral Hospital, leaving the show to appear in the off Broadway play Be Happy for Me. The New York Timesdrama criticFrank Rich found Groh "completely convincing as the brash gold-chain-and-bikini-clad Lothario". Other New York City theater credits include Road Show, and The Twilight of the Golds. On television, Groh appeared in guest roles on such series as Buck Rogers in the 25th Century, L.A. Law, Baywatch, Law & Order, Murder, She Wrote, Melrose Place, The X-Files, and JAG. His film career includes appearances in Two-Minute Warning, Smash-Up on Interstate 5, Victory at Entebbe, A Hero Ain't Nothin' but a Sandwich, The Dream Merchants, The Return of Superfly, Get Shorty,9 and several independent films.
Personal life
Groh was a serious collector of antique furniture and folk art, much of which he kept in a second home in Connecticut. He mainly resided, however, in Santa Monica, California, where he lived with his third wife, Kristin, and his son Spencer .