Who was Pernell Roberts on MASH?

Pernell Roberts was not on the CBS television series, M*A*S*H (1972-1983). After the series ended, Roberts did take the role of Trapper John McIntyre (originated in the book) for the CBS medical drama, Trapper John M.D. The show took place in San Francisco and ran from September 1979 until September 1986.