This morning while playing an early pre masters round with my brother we came to a par 4 where I was hitting my 3rd shot out of the a bunker about 50 yards out. I hit my shot on the green bounced and spun at the pin. It hit the pin and was on the outside of the hole. When we walked up we saw the only thing keeping the ball from falling in the cup was the flag pinning the ball to the side of the cup. When I moved the stick the ball fell in, what was the score? We agreed a birdie was that the correct call?