Taylor Nees led the 5th-ranked (Class 1A) G-H boys (9-0) with 16 points, and Mark Cronin added 12. Seth Duff led O-A with 15 points, and Quinn Reik added 12.
Nees also paced the Pirates on the boards with 15 rebounds, and Cronin grabbed seven.
"We made some mistakes in the second quarter defensively and Odebolt-Arthur did a good job of capitalizing on them," said G-H coach Bob Lee. "We regrouped at halftime and played a much better second half. I'm real proud of how our guys responded to a little adversity."
In the girls game, the Lady Pirates fell behind 31-14 at halftime and couldn't make up the difference despite outscoring the Trojanettes 30-25 in the second half.
Alyssa Martin led G-H with 14 points, and Victoria Andresen added 12, and Brooke Wiese seven, and Heather Joslin six.
"We started off the first quarter pretty well offensively and defensively," said G-H coach Ken Slater. "We did not close the quarter out very well and O-A took control of the game in the middle quarters. We did not have an answer defensively for them. They executed their offense very well."
The G-H teams play at Remsen-Union Friday, and host Westwood Saturday.