I’ve used defensive efficiency, and people are like, "What the hell is that?" I do think that it's a somewhat illustrative stat for team defense. How often does this team turn a batted ball into an out. I think the top teams for defensive efficiency are based on what you see, good defensive teams.

I talk about the Fielding Bible statistics. I think fielding statistics are still evolving. But they’re one of the best at trying to evaluate each and every player defensively. Who else looks at every single play? Is there still some subjectivity? Of course. But they’re doing it as thoroughly as anybody I know, so I’ll use some of their numbers. Like Austin Jackson made 10 more plays in center field than anyone else last year. That’s impressive. I felt in watching him, I felt, That’s Gold Glove caliber defense in center field. He made +33 plays, +21 runs saved. That’s both the best at his position. I try to ask, Does it give people are clear understanding and is it something they can use? Then I’ll try to introduce it.