MOUNDSVILLE - John Marshall outscored Barnesville 29-8 during the third quarter en route to a victory against Barnesville.
Tanner Filben exploded for game highs of 30 points and 10 boards for the Monarchs (6-15). Evan Magers added 14 points, while Derek Och had 10.
Zach Houston led the Shamrocks (7-14) with 22 points. Dylan MacMillan and David Stewart each added 14.