MacRury has had an up-and-down season with the bat but approached this key innings for his club with a fresh outlook.
"I sort of just let everything go and tried to be as clear as I could, and go out and get some runs in the biggest game of the season."
Greeton just held off Cadets, who made 218/7 in a rousing final and tremendous endorsement of the calibre of Baywide cricket.
"It is pretty awesome to defend the cup. It was our goal at the start of the season so full credit to Mox [MacRury] with the bat carrying us, and all our bowlers did so well," Greerton captain Shane Wineti said.
"We had them 18/3 and we thought we were right in there, and then a great partnership (106) from Jonno [Boult] and Sifty [Scott Steward] probably put it in their hands."
The win means Greerton will again be Bay of Plenty's team to take on Northern Districts' best to play at the annual National Club Cricket Championships held at Cornwall Park in Auckland.
"We have what it takes to win up there," Wineti said.