Through the years , we have certainly come across photos of Mantle 's obscure 1951 # 6 jersey .
We have NEVER encountered a baseball card that clearly depicts Mantle 's legendary rookie season number Mantle he eventually switched over to the iconic # 7 .
Through the years , we have certainly come across photos of Mantle 's obscure 1951 # 6 jersey , but we have NEVER encountered a baseball card that clearly depicts his legendary rookie season number before he eventually switched over to the iconic # 7 .