Nick Castenholz started the scoring with a 27-yard touchdown pass to Alex Jawor in the first quarter.
Seth Morgan found the end zone with a one yard run in the second quarter to give the Bulldogs a 14-0 lead.
Shelby then responded with a 31-yard rushing touchdown from Juan Cavazos to cut the Ravenna lead to 14-7.
The Bulldogs took a 20-7 halftime lead after a touchdown pass from Castenholz to David Thompson from 20 yards out.
In the third quarter, the Bulldogs rushing attack took over with two touchdowns from Thompson and one touchdown from Morgan.
Ravenna added a 26 yard field goal from Mason Averill in the fourth quarter to close out the scoring.
Castenholz finished with 10 completions on 17 attempts, 171 yards, and two touchdowns, while Thompson had 158 yards on 25 carries and two touchdowns.
David Denning led the Bulldog defense with nine tackles, including four for losses.
Shelby was led by Cavazos who rushed for one touchdown and 55 yards on nine carries. Michael Rodriquez led the Tigers with 14 tackles.