The Marshfield Tigers had four players in double figures as they down the Blue Jays 71-61.
Marshfield was led by Maddie Michaelis with 19 points, Daniella Minsaas added 14, Kaydee Johnson added 13, and Paige Preston added 12.
Merrill was led by Courtney Krueger with 21 points.
The Tigers move to 10-5 overall, 8-1 in the Wisconsin Valley, one game up on the SPASH Panthers.
Marshfield next hosts Eau Claire North in a non-conference clash on Tuesday.
