The 1971-72 season saw Bob Richer make his professional hockey debut, spending most of his time with the Charlotte Checkers of the Eastern Hockey League. Richer was a member of the 1972 Eastern Hockey League champions
The following season Richer was promoted to the Sabres chief minor league affiliate. Though he spent the majority of the season with the AHL Cincinnati Swords, Richer was promoted for what turned out to be his only three career NHL games during that 1972-73 season. He picked up no points in that trial.
Unable to secure a roster spot with the Sabres in 1973-74, Richer returned to Cincinnati where he would play in his final season of professional hockey.