From Wikipedia: Reed was born John Robert Rietz, in Highland Park, Illinois, the son of Helen (née Teaverbaugh) and John R. Rietz. Reed spent much of his childhood in Muskogee, Oklahoma, and later studied Shakespeare in college. He was educated at Northwestern University, where he was a member of Beta Theta Pi, and later transferred to the Royal Academy of Dramatic Art, in London.
He gained his greatest fame as the father, Mike Brady, on the sitcom The Brady Bunch, on which he appeared from 1969 to 1974. From the beginning of The Brady Bunch he was unhappy with the part, feeling that acting in the often silly sitcom was beneath his serious Shakespearean training. Despite his discontent with the show, by most accounts he genuinely liked his co-stars, and became beloved as a father figure by the younger cast members. In an effort to bring more realism to the show, Reed argued with the show’s creator, Sherwood Schwartz. He frequently presented Schwartz with written memos detailing why a character’s motivation did not make sense, or why it was wrong for one episode to combine elements of different styles, such as farce and satire. One such argument resulted in Reed being written out of the show’s final episode. Reed reprised his role in the variety show, The Brady Bunch Hour, as well as The Brady Brides, several made-for-TV Brady movies, and new series that followed, The Bradys.
During the run of The Brady Bunch, Reed also had a recurring role as Lt. Adam Tobias on the television drama Mannix from 1967 to 1975 for most of its run.