The game begins at 7 p.m. Friday at Dublin High.
Eighth ranked Dublin is 6-4 on the season. The Gaels have lost three of their past four games.
Ninth ranked Livermore is 2-8 on the season, having lost its past eight games.
This is the first time the Cowboys, who dropped down to Division II, have made the playoffs since 1999. Livermore defeated the only two Division II teams it played this season to qualify for the tournament.
Valley Christian is 8-2 this season, having won its past four games.
Drake High is 5-5 this year, having lost two of its past three games.
This game will be played at Chabot College.