It stayed close for much of the third quarter, but a disturbing trend began to take hold as Marcellus only got one field goal in the last 5:48 of the period.
Here, as in the rest of the game, guards Dan Heil and Will Nolan didn't find much room to shoot while guarded by Mike McMullen and Nate Nigolian. Heil had nine points and Nolan six points, but neither would make a 3-pointer all night.
Gradually, that lack of production would take a toll. Mike Mascari's 3-pointer at the end of the third period doubled Westhill's lead to six, 39-33, and ignited a key 7-0 run. Marcellus never got too close again.
Playing through pain, Fiacchi still had 18 points. Westhill's diverse attack featured McMullen getting 21 points, including a trio of 3-pointers, while Dan Ross worked inside for 15 points and Tom Fisher got most of his 10 points in the second half.
As Westhill moved on to face Hannibal in Tuesday night's overall Class B final, the Mustangs completed a 19-4 season. Five seniors depart, including Heil, Zach Barbaro, Scott Cotter, Joe Cornish and Stu Canfield.
Still, with Fiacchi, Nolan and Niko Wagner leading a solid returning cast for 2009-10, Marcellus ought to contend once more.