FED Balk Rule & Mechanic

[cookie]

"...There is not a 45 degree rule that I'm aware of..."

I have not seen it written in OBR nor Fed, but it is written in the NCAA Rule Book (2010): Rule 9-1-a (6)

Rule 9-1-a(6): The pitcher must step directly and gain ground toward a base in an attempt to pick off a runner. “Directly” is interpreted to mean within a 45-degree angle measuring from the pivot foot toward the base the
pitcher is throwing to or feinting a throw.

[bob jenkins]

FED 6.2.4B

One of the OBR "authoritative opinions" (JEA or J/R) has the similar wording.