Michael J. Fox is retiring again.<br />The beloved actor shared his decision to retire due to health concerns in his new book "No Time Like the Future".<br />Fox has had recent health issues, including a 2018 surgery to remove a noncancerous tumor from his spine.<br />CNN reports that Fox was also diagnosed decades ago with Parkinson's disease.<br />Fox became a household name starring on the 1980's comedy series "Family Ties".<br />He then went on to star in the "Back to the Future" franchise and "Teen Wolf," as well as returning to television in "Spin City."
