Mezue ahịrịokwu na-esonụ: Mgbe ọ laghachiri na Pirates na June 1969, ọ na-esi na Pittsburgh bullpen site na 1970, na-apụta na egwuregwu abụọ nke
1970 National League Championship Series megide Cincinnati ma na-arụ ọrụ ngụkọta nke otu ụzọ n'ụzọ atọ nke inning. A tọhapụrụ ya na ngwụcha ọnwa Ọktoba, Gibbon sonyeere Reds na 1971 wee bipụta 2.94 ERA ma jikọta akara kachasị mma ya maka nchekwa na 11.