WHISK together syrup and 1/4 cup peanut butter in medium microwave-safe bowl until smooth. Microwave on HIGH 30 to 60 seconds to warm.
MASH 1 banana in large bowl. Add pancake mix, buttermilk, eggs, cinnamon and remaining 2 tablespoons peanut butter. Stir until well blended.
COAT griddle with no-stick cooking spray. Heat over medium heat. Pour 1/4 of the batter for each pancake onto griddle. Cook pancakes until bubbles begin to break on surface. Turn and cook until golden brown.
SLICE remaining banana into medium bowl. Stir in sliced strawberries. Serve pancakes topped with sliced fruit and peanut butter syrup.