Daniel Smith "Silent Danny" Cox (born October 12, 1903 in Little Current, Ontario - died August 8, 1982) was a professional ice hockey forward who played 321 games in the National Hockey League. He played for the Toronto Maple Leafs, Ottawa Senators, Detroit Falcons, and New York Rangers.
He signed as a free agent with the Toronto St. Pats in 1926. Splitting that season with the minor pro Hamilton Tigers, Cox played with the Toronto NHL team until 1930. In January of that year, he was traded to the Ottawa Senators for Frank Nighbor.
In 1931-32 the Senators did not play so Cox played for the Detroit Falcons. He returned to the Senators the next season. He secured his release from Ottawa in 1934 and then finished the season with the New York Rangers.
That marked the end of his NHL career, with 47 goals and 49 assists in 319 games.
Cox became the player-coach of the Minneapolis Millers in 1934-35. He then played for the Philadelphia Ramblers for two seasons. He returned to player-coach, this time for the Seattle Sea Hawks in 1937-38, 1938–39, and 1940–41, and the Wichita Skyhawks in 1939-40. He retired as a player in 1941 and was the coach of the Philadelphia Rockets in 1941-42.