Format
1998 was the second year that the controversial "back door" or qualifier system was used in the All-Ireland Championship. While the two provincial final winners automatically qualify for the All-Ireland semi-finals the two defeated provincial teams join Galway and the Ulster provincial final winners in two "quarter-finals". The two winners from these two games qualify for the semi-finals where they meet the Leinster and Munster winners. In 1998 Waterford and Offaly were the two teams to benefit from the qualifier system.
Read more about this topic: All-Ireland Senior Hurling Championship 1998