If he was pretending to pitch left handed after pitching right handed then the ambidextrous rules apply.

Sounds like you meant right arm as you said the ball was between both hands. So he wasn't wearing it on the hand. Violation.

This is a clear example of a clever genius finding a wicked loophole in the rules at a time when it's going to do him the most harm. I frankly can't imagine any scenario where I'd attempt a normal pick-off move if my wife was R1, let alone try some bush-league pick-off move.

Whether the move was legal or not, you should tell you Dad to admit he was wrong, apologize to your mom, buy her some flowers, and send an email to the entire family offering a forfeit.

But he didn't

8.01(f ) A pitcher must indicate visually to the umpire-in-chief, the batter and any runners the hand with which he intends to pitch, which may be done by wearing his glove on the other hand while touching the pitcher’s plate.
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So as a pitcher you are required to cooperate with the baserunner? Do you also have to tell the runner at 1b when you are going to throw over? Glove was worn on the right hand and ball was thrown with the right hand. So this is a violation of 8.01? This is what I need to tell my mom so she knows how to lead off 1b better.

Yeah, there's that, too.

A pitcher is allowed to be deceptive and gain an advantage within the rules, for example changing his/her timing. But as far as declaring which had he is pitching with, yes by rule the pitcher must declare by wearing the glove on the other hand.

I wouldn't tell your mom to lead off smarter, I'd tell you Dad to not cheat in front of the grandkids...

Tell your dad not to circumvent the rules. Seriously, this is on him, not your mom.

You all should stop playing baseball at Labor Day picnic and play soccer instead. See what kind of arguments you can get into with that.

We tried soccer as well but my dad's team would just get ahead and start kicking the ball out of bounds as far as they could. He thought is was so funny because it just wasted time. What is the rule against that?:mad:

Find a new Dad. This one only cares about himself and will do whatever it takes to prove it.

stop feeding the trolls

Always listen to bob.