Scoring for Plymouth was Justin Drudge, with two TD runs, and Taylor Fulton with one of his own.
Drudge and Ryan MacLain had interceptions for the young Rockies while Kevin Escobar and MacLain recovered fumbles.
Benjamin Schenk came up with a fantastic reception to seal the game in the fourth quarter.
Head Coach Phil Bockman felt that “We played well! We have a lot to work on but winning our first game of the season is a step in the right direction.”
The freshman Rockies will host John Glenn on Thursday at the Rockpile at 5:30.