What does SD stand for?

Standard Drives

Steam Drum

Speed Droop

Scientific Design

Single-decision

In baseball, a "single-decision" play refers to a play where the umpire has to make only one call to determine whether a player is safe or out. This typically occurs when a runner is attempting to reach a base before the ball arrives, or when a fielder is attempting to tag a runner who is advancing to the next base.

The single-decision play is the most common type of play in baseball, and the umpire's call in these situations can have a significant impact on the game. Umpires are trained to make quick and accurate decisions in these situations, and they are expected to use their best judgment to determine whether a player is safe or out.