Analysis of information sources in references of the Wikipedia article "美國職棒大聯盟單場滿貫砲數排行榜" in Chinese language version.
比爾·穆勒...成為唯一一位單場左右開弓都打出全壘打的球員（Bill Mueller...became the only player to hit grand slams from both sides of the plate in the same game.）
（諾思魯普）先在五局將費雪投出的第一球打到右外野大牆外，接著又將第六局將左投希爾·羅爾的第一球打成滿貫砲（[Northrup] drilled Fisher's first offering over the right field fence, then unloaded another first-pitch grand slam off southpaw Hill Rohr in the sixth...）
比爾·穆勒...成為唯一一位單場左右開弓都打出全壘打的球員（Bill Mueller...became the only player to hit grand slams from both sides of the plate in the same game.）
（諾思魯普）先在五局將費雪投出的第一球打到右外野大牆外，接著又將第六局將左投希爾·羅爾的第一球打成滿貫砲（[Northrup] drilled Fisher's first offering over the right field fence, then unloaded another first-pitch grand slam off southpaw Hill Rohr in the sixth...）
比爾·穆勒...成為唯一一位單場左右開弓都打出全壘打的球員（Bill Mueller...became the only player to hit grand slams from both sides of the plate in the same game.）
