A more likely scenario is that it is a simple misidentification of a pike or pickerel.
No pure strain musky in mass, no tigers in quaboag either
The Mass F&G website does show Quaboag Pond on the Pike/Muskie stocking program, but it looks like they haven't been stocked since before 1999. That's the first date on the report.If they were stocked before then, and some have survived and spawned, it is possible that there could be some there today.