Why Burghoff left mash?

Gary Burghoff left "MAS*H" after the seventh season primarily due to a desire to pursue other opportunities and to spend more time with his family. He felt that the character of Radar O'Reilly had reached a natural conclusion, and he wanted to avoid overstaying his welcome on the show. Additionally, Burghoff had expressed a need for a change in his career and personal life. His departure was significant, as he was one of the original cast members and a fan favorite.