Complex sentence: In 1931, Michalske led the Packers to an unprecedented third consecutive NFL championship, and he was selected as a first-team All-Pro on the official NFL All-Pro team and by the United Press and the "Green Bay Press-Gazette".
Split into simpler sentences: In 1931, Michalske led the Packers to an unprecedented third consecutive NFL championship. At the end of the season, Michalske was selected as a first-team All-Pro on the official NFL All-Pro team and by the United Press and the "Green Bay Press-Gazette".