Old Boys are already guaranteed a home semifinal spot but will still want to finish top by beating the Pirates today.
Meanwhile, Taupo Wanderers are scheduled to host Geyser Fossils and Central will face Geyser 1 at Ray Boord Park.
Following back-to-back wins, Geyser 1 look set to finish in the top four.
However, there is a chance they could miss out if Geyser Fossils, the club's second team, defeat Wanderers by a good margin and Geyser 1 lose to Central.
Wanderers and Central cannot make the final four but will look to grab a rare win this weekend.
Reserve grade
Today's draw (games scheduled to start at 1pm):
Taupo Old Boys v Eastern Pirates, Smallbone Park; Taupo
Wanderers v Geyser Fossils, Owen Delany Park; Central v Geyser 1,
Ray Boord Park; BOP Indians bye.
Points table:
Taupo Old Boys 24, Eastern Pirates 18, BOP Indians 15, Geyser 1 12,
Geyser Fossils 6, Taupo Wanderers 6, Central 3.