Marshall Wright has a record of Griswold playing in a match game for the Putnams of Brooklyn in 1857. Griswold, who mentioned playing for the Putnams in his letter to Al Spink, played in either the game against the Atlantics of Brooklyn on September 24 or the game against the Continentals of Brooklyn the next day. In the one game that Griswold played, he had two "hands lost" and didn't score any runs.
In his letter to Spink, Griswold also mentioned that he played with the Hiawatha Club of Brooklyn in 1858 and 1859 before coming to St. Louis. The Brooklyn Eagle has an account of a game the Hiawathas played on July 31, 1858 that includes a box score and mentions Griswold by name.
The Eagle also has a box score for a game the Hiawathas played in October of 1858 that also mentions Griswold.