When a ground ball rolls and touches both inside and outside the foul line, what is the ruling?

When a ground ball rolls and touches both inside and outside the foul line, the key aspect of the ruling is based on the location of the ball's position relative to the foul lines. In baseball, the ground ball becomes fair if any part of it is touching or has touched the fair territory, which includes the area within the foul lines. Therefore, if the ball rolls and makes contact with the inside of the foul line at any point, it is considered fair, even if it also touches the outside part of the foul line afterward.

The fair territory is defined as the area bounded by the two foul lines and reaching to the outfield, thus any part of the ball that touches fair territory during its course makes it a fair ball. The touching of the outside of the foul line does not negate the fairness established by contact with the inner part. This understanding is fundamental for players and officials in determining the outcome of the play.