The game was called after five innings due to the mercy rule.
The Bombers got to Stratford starter Ronny De La Cruz early, scoring five runs before Steve Collins entered the game in relief.
Top batters for the Bombers were Colin Myers 2-for-3 with a walk, Dillon Doucette 1-for-1 with an RBI and three hit-by-pitches, and Tyson McInnis 1-for-3 with a pair of RBIs. Top batters for the Athletics were Allister Smith 1-for-2 with an RBI, Corey Dougay 1-for-2, and Dominic Ryan 1-for-3.
Josh Coffin scattered four hits to pick up the win for the Bombers. Game two of the finals will be played Wednesday at 7:30 p.m. at Memorial Field in Charlottetown.
