Stone and teammate Mike Sugamosto made a series of shots and the Cobras picked up its own full-court pressure. Grimes took just two minutes to shrink Westhill's lead to single digits, igniting the home crowd for the first time all night.
"We've had trouble in the past in this gym," Fisher said. "We were concerned, but we didn't lose our composure."
Grimes would pull within five, 49-44, on Tavon Moore's free throw with 1:07 left, but would not score again as, again, the shots fell off line. Meanwhile, Fisher and J.T. Alcaro sank the clinching free throws.
Overall, Ross had 12 points, while Fisher and Alcaro each had nine points. Justin Biles came off the bench to score eight points as Dan Karleski added six points. Stone led both sides with 17 points, with Sugamosto contributing 13 points.
At 8-1 as it hit the midway point of the regular season, the Warriors get another big road test next Friday, when it visits Marcellus.