Is this an illegal pitch

[BretMan]

Originally Posted by paulg68

We really don't find anything in the book about the non pivot foot landing outside on delivery as being illegal...

You're just not looking hard enough.

See 6-1-2-b.

Once the hands are brought together and are in motion, the pitcher shall not take more than one step which must be forward, toward the batter and simultaneous with the delivery. Any step backward shall begin before the hands come together. The step backward may end before or after the hands come together.

NOTE: "Toward" is interpreted as within or partially within the 24-inch length of the pitcher's plate. (See "Figure")

In addition, the referenced "Figure" shows that the stride foot landing outside the 24" width is illegal.