Legal Base Path?

[greymule]

Had virtually the same play yesterday, though it was baseball. Strike 3 in the dirt and off the catcher; ball rolls 4 feet up the 1B line; F2 runs out, picks up the ball, and throws to 1B as B1 (rh batter) runs wide to the foul side of F2, out of the baseline. I got fooled and didn't call it, because F2, apparently having decided immediately to make the play at 1B, utterly ignored B1 and didn't look for a tag. But somebody in the stands yelled, "Out of the baseline," and I think the fan was right. I should have called it, because the batter-runner, while F2 had the ball, did run out of the baseline to avoid a tag, not just to avoid interfering. Luckily for me, the throw didn't go astray.