No.2 Ball, who won both her matches on Day 1, was thumped 8 and 6 by Catherine Bell.
No.4 Kayla Van de ven remained unbeaten for the tournament in halving her match with Nicola Webb.
Dwayne Russell continued his outstanding form for PBEC as they went down tto Otago on the Tauranga course.
Russell, at No.3, beat Brandon Hodgson 2 and 1 for his third consecutive win.
No.1 William Brown lost 3 and 1 to Inia Logan; No.2 Andrew Higham lost 1-down to Ryan Bellamy; No.4 Hukanui Brown lost 6 and 5 to Parker Aluesi; and No.5 Shayde Skudder lost 3 and 2 to William McLauchlan.
HBPB women faced Taranaki in this afternoon's round while PBEC men were up against Wellington.