Thread: Gorilla Arm
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Old Wed Aug 08, 2012, 08:26pm
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Join Date: Sep 2007
Location: Ulster County, NY
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The 2010 NFHS Baseball Rules Changes (B Elliot Hopkins, CAA) has 3 pages (18, 19, 20) clarifying the SET position with regard to the Gorilla Arm, and the word "Gorilla" is specifically mentioned on page 20:

"Rule 6-1-3
Set Position

• Umpires must be aware of the position of the
pitcher’s feet. There position determines if
the pitcher is in either the wind-up or set
position.
• The “Gorilla” stance is a legal stance of the
set position as long as the pitcher’s arm does
not swing. If his arm is swinging, this is
considered as a means to deceive the batter
and runner(s).

Rationale: Clarification."
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