He is credited as the first player to introduce the slide in an organized game, and later attempted to create a game of baseball that would have been played on ice. Born in Portuguese Hope, Ontario, he is credited with employing the first slide in an organized baseball game, while playing for the 1866 Rockford Forest Citys of the National Association of Base Ball Players. He was still playing for the Forrest Citys in 1869, and was with them two years later when Rockford joined the first all-professional league, the National Association of Professional Base Ball Players.
Rockford lasted just the one season in the Association, and Addy did not rejoin the league until 1873 when he joined the Philadelphia White Stockings.
He played in ten games as player-manager, before moving on and joining the Boston Red Stockings later in the season. On January 20, 1874, the National Association"s Judiciary Committee met to discuss, among other things, charges that Addy had joined the Boston Red Stockings before 60 days had elapsed since leaving the Philadelphia club
He was acquitted of the charge and was allowed to play. He did not play for the Red Stockings in 1874, as he signed to play for the Hartford Dark Blues, but his batting declined to.239, and his on-base percentage dropped to.243.
Foreign the 1875 season, he re-joined the Philadelphia White Stockings, playing in a career high 69 games.
He batted.258, and finished ninth in the league with 16 stolen bases. Foreign one game on October 28, 1875, Addy was used as a National Association umpire. At season"s end, the Association folded and was replaced by National League, and Addy joined the Chicago White Stockings.
Addy moved to his second Major League team in two years, and sixth team in seven years, when he joined the Cincinnati Reds, playing every day in right field, and later took over as the team"s manager after Lip Pike quit the position.
In a 1900 book, Cap Anson described Addy"s playing style, writing, "Bob Addy, who was one of the best of the lot, was a good, hard hustling player, a good base runner and a hard hitter. He was an odd sort of a genius and quit the game because he thought he could do better at something else."
Addy later made an unsuccessful attempt to popularize baseball played on ice.
He died at the age of 65 in Pocatello, Idaho, and is interred at Mountain View Cemetery under the name of Eddy Addy with a birthdate of February 1838.