In the 1974 season, Pomeroy placed 14th overall in the 250cc motocross world championship. Pomeroy along with Brad Lackey, Jimmy Weinert and Tony DiStefano represented the United States at the 1974 Motocross des Nations event where they finished in an impressive second-place, marking the best-ever result at the time for an American team at the event. Pomeroy continued to race for Bultaco in the world championships until 1976 when he posted a career-high finish of fourth place against the best riders in the world. He also posted another impressive result at the 1975 Trophée des Nations where he won a race during which he defeated the reigning 500cc world champion, Roger De Coster.