Whiffen (11 points) and Rosati (nine) combined for 20 points in the first half to lead the Wildcats to a 54-22 League VI girls basketball victory.
"We came out aggressive and ready to play," said Whiffen, who finished with 13 points. "We wanted to get this win."
Shoreham-Wading River (4-3, 3-0) was efficient offensively in the first quarter, breaking down Mount Sinai's 2-3 zone with quick ball movement in the half-court to take a 15-10 lead after one. Rosati went on a personal 6-0 run to give the Wildcats a 10-4 lead, while Whiffen planted herself in the post and scored four.
"I feel like we attacked the gaps really well and capitalized against their defense," said Rosati, who finished with 11.
The 5-11 Whiffen said, "They didn't have too many bigs, so I used that to my advantage."
In the second period, the Wildcats' defense was perfect, shutting out Mount Sinai (4-3, 0-3) with eight steals and four turnovers to take a 27-10 lead at the half. Whiffen and Rosati got to the free-throw line a combined four times, and scored 10 of SWR's 12 points in the quarter.
"[Rosati] does a great job of driving to the basket and puts the defense on its heels when she steps in and [Whiffen] did a great job putting back in offensive rebounds," Shoreham-Wading River coach Dennis Haughney said. "They both shot free throws really well today, too."
The third quarter brought more of the same. Meghan King was big for the Wildcats down low, scoring seven points in the paint to extend Shoreham-Wading River's lead to 42-13. The Wildcats emptied their bench in the fourth and cruised to victory.
"Defense is our staple," Haughney said. "Sometimes in these games, you can play down a little a bit but we stayed sharp."
King finished with a team-high 14 points, all in the second half, and Kerri Clark scored eight off the bench. King added nine rebounds, Whiffen had six rebounds and Rosati and Courtney Clasen each had four steals.