SLUGGER'S STAT is a term used to refer to the performance of a baseball player who is known for their ability to hit the ball hard and far. HRS stands for Home Runs, which is when a batter hits the ball over the outfield fence. RBI stands for Runs Batted In, which is when a batter hits the ball and causes a teammate to score a run. RBIS stands for Runs Batted In by Season, which is the total number of runs a batter has caused a teammate to score in a single season.