"He is a name people should start remembering right now. He opens the bowling and can bat anywhere in the top four."
Collier and Yarrall put on a good partnership of 70 runs before Yarrall went on to craft his century.
"I had the privilege of being at the other end watching him," Collier said.
"There was not a slog in sight ... they were great cricket strokes."
Geyser 1 went on to win the match, posting 196/7. In reply, Eastern Pirates posted 147/7.
Yarrall took two wickets, including the important wicket of Pirates captain Des Beckett.
Geyser 1 won both their T20 games on Saturday, meaning they have a great chance of making the final next Saturday.
Only one other club, the Bay of Plenty Indians, registered two wins in the first two rounds.
The Indians defeated Taupo Wanderers in the first round before toppling Central in the second round.
Yarrall is from Rotorua but goes to boarding school in Hamilton.
- Rotorua/Taupo senior reserve grade T20 competition results on Saturday (Owen Delany Park):
Round 1:
Geyser 1 143/7 (Eamon O'Donoghue 24, Matt Mitchell 22) defeated Taupo Combined College 119/8 (Shannon McSkimming 27)
Eastern Pirates defeated Taupo Old Boys
Geyser Fossils 117/7 lost to Central 118/2
Taupo Wanderers 132/8 lost to Bay of Plenty Indians 135/6
Round 2:
Taupo Combined Colleges lost to Taupo Old Boys
Geyser 1 196/7 (Tom Yarrall 103no, Matt Collier 26) defeated Eastern Pirates 147/7 (Craig Downs 47no, Mike Redwood 34)
Central 98/9 lost to Bay of Plenty Indians 99/6
Taupo Wanderers 140/7 defeated Geyser Fossils 137/7