[1] In 1948, he scored the lone Curry Vets goal in their 4–1 loss to Ponta Delgada S.C. in the final of the 1948 National Amateur Cup.
Although he made his name as a goal scorer, Grivow moved to the backline in the last two years of his career.
[3] Following the tournament, Grivnow gained his caps with the United States national team when he came on for Gino Pariani in a 5–0 loss to Northern Ireland on August 11, 1948.
[4] His second game with the national team was a 4-0 World Cup qualification loss to Mexico on January 10, 1954.
[4] Following his retirement from playing, Grivnow became a referee in the local amateur leagues.