Wouldn’t the minimum be 51? 932 =54, but if the team batting second is winning after the top of the 9th then they don’t need to play the bottom of the ninth, so subtract 3? Not a baseball person.
And if you have rain , they can call the game "complete" if the losing team had 5 half innings at bat. So that could be 28. Assume 27 outs and one home run by the home team.