Complex sentence: Although every player has an off day, Robinson reached an all-time low in fielding on May 26,1891, when, while playing for the Cincinnati Kelly's Killers, he had seven fielding chances and committed seven errors.
Split into simpler sentences: Although every player has an off day, Robinson reached an all-time low in fielding on May 26,1891. On that date, while playing for the Cincinnati Kelly's Killers, Robinson had seven fielding chances and committed seven errors.