Indisputable PROOF! You "know-it-all" umpires are proven WRONG! HA HA HA!
Yes, the HANDS
ARE
Part of the BAT! (for they couldn't say it if it were not true!)
Mariners | Notebook | Bunt attempt ends badly for Rob Johnson | Seattle Times Newspaper
The relevant text:
He ran slowly toward first, wondering if it might be called a foul ball. It wasn't because a hand on the bat is considered part of the bat.