[Rich Ives]

Originally Posted by rbmartin

Unless he violates the following:

Rule 6.05(k) In running the last half of the distance from home base to first base, while the ball is being fielded to first base, he runs outside (to the right of) the three foot line, or inside (to the left of) the foul line, and in the umpire's judgment in so doing interferes with the fielder taking the throw at first base; except that he may run outside (to the right of) the three foot line or inside (to the left of) the foul line to avoid a fielder attempting to field a batted ball;

Off the top of my head, this would be the only scenario which comes to mind where I have the Batter/runner being called out.

ADD THE COMMENT:

The batter-runner is permitted to exit the three-foot lane by means of a step, stride, reach, or slide in the immediate vicinity of first base for the sole purpose of touching first base.