The Blue Devils added another 210 yards in the air, 144 coming from Adam Ritchey on a 7-for-7 performance in the first half, including a 43-yard score to Brandon Trefelner.
In the second half, Brett Meyers took over at quarterback and had a 22-yard scoring pass to Tyler Szaflarski, who made a splashing varsity debut as a freshman, also adding another 40 yards rushing.
"The offensive line blocked so well, I could have even run through it," said Tinninis. "I really feel good about Schaeffer and Szaflarski."
Greencastle's array of talented backs was even one short as senior Dustin Barry watched the game from the sidelines due to an injury.
"I thought our offensive line blew them away," said Ritchey. "We got three-deep at fullback and two or three at halfback."
Ritchey was also surprised at his aerial display.
"I surprised myself how well I threw the ball," he said.
Tinninis was impressed.
"(Ritchey) developed throwing the ball over the summer," he said. "We're trying to put him in the best position to succeed."
It took Greencastle until its second series to get going as Ritchey connected on a rollout pass to Trefelner for 24 yards that set up Shindle's 23-yard run.
On the next series, Ritchey executed perfectly on play action and connected with Szaflarski, coming out of the backfield, for a 22-yarder that set up Schaeffer's 1-yard run.
James Buchanan answered near the end of the first period on a 32-yard connection from Jesse Smartt to Alex Buterbaugh. But Greencastle dominated with three second-period scores and led 35-14 at the break and never looked back even though the Rockets kept their efforts up.
Smartt hit talented Tyson Keith with a 59-yard score in the second period and another scoring pass covering 61 yards to Buterbaugh in the fourth.
Smartt finished 10 of 26 passing for 200 yards, a big difference from the minus-34 yards the Rockets had on the ground.
"We had some great cycles of play from our offense and when it was 42-14, we were still working hard," said JB coach Mark Yurek of his debut outing. "We've got 28 kids, three seniors, and we battled a team that rotated a lot of players. I'm happy over our effort."