William Wayne McMillan Rogers III ( born April 7 , 1933 ) is an American film and television actor , best known for playing the role of Captain `` Trapper John '' McIntyre in the CBS television series , `` M * A * S * H '' .
William Wayne McMillan Rogers III ( born April 7 , 1933 ) is an American television and movie actor . He played the role of `` Trapper '' John McIntrye on the TV series `` M * A * S * H '' .