Boone had a pretty good arm, but it wasnt like a Molina arm, but he might have been one of the smartest players to ever play the game. My guess is that many of his CSs were just a matter of him outsmarting the baserunner, they didnt keep track of pitch outs then but I bet he got alot of guys on those. The pitch out is now a dead concept, but back when he played it was still pretty common.
Boone has to be on the short list of guys that were sons of ML players and had multiple sons that were multiple ML players. He knew (knows) the game like very few.
He also had a freakish lack of decline as he aged. He put up a 1.9dWAR at 41 and never had a bad dWAR season. He was a pretty steady 1.0 - 2.5dWAR every year.