If you’re new to the game of baseball, or coaching for the first time, then you’re probably wondering what a lot of the new terms and sayings you’re hearing mean. With our Baseball 101 series, we’re here to help.   Today’s Baseball 101 question is: What is a Grand Slam in baseball?   A Grand Slam is a bases loaded home run. In other words, it is when a batter hits a home run while all of the bases are occupied. When a batter hits a grand slam his team scores 4 runs. This is the highest scoring play possible …